Pipe bending machine with fixed-length cutting function

Abstract

The utility model discloses a fixed-length cutting pipe bender, which comprises a pipe bending disc, a clamping feeding device and a rack, the outer side of the pipe bending disc is connected with an outer fixing plate in an opening and closing manner, when the outer fixing plate compresses a pipe fitting to be attached to the outer side of the pipe bending disc, the pipe bending disc rotates for pipe bending, and an opening and closing driving assembly is arranged between the pipe bending disc and the outer fixing plate. The servo roller can be used in cooperation with a detachable connecting structure of the metal strip and the pipe bending disc in a combined mode, the metal strip can be wound or unwound according to production requirements and then connected to the outer side of the pipe bending disc to change the pipe bending radius of the pipe bending disc, pipe bending parameters can be rapidly adjusted and used, convenience and production efficiency are improved, and production efficiency is improved. And the telescopic rod is used for driving the servo roller and the cutting machine to horizontally move for use, on one hand, the cutting machine for horizontally moving work can move within a small range and then is matched with feeding of the pipe to achieve fixed-length cutting use, and on the other hand, the servo roller can be driven to move to avoid affecting bending and shielding of the pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe bending machines, in particular to a fixed-length cutting pipe bending machine. Background Art

[0002] Pipe bending is a type of pipe that is often used for pipeline laying and maintenance in the fields of oil transportation, gas transportation, liquid infusion, engineering bridge construction, etc. It generally requires the use of a pipe bending machine to bend the straight pipe before it can be processed into shape. The settings of the pipe bending machine can be adjusted according to the required bending radius and bending angle of the pipe to bend pipes of different diameters.

[0003] At present, the existing pipe bending machines generally cut a certain length of pipe and then bend it to form a bent pipe. The pipe cutting step exists before the bending step, so that the pipe bending process can only be frequently loaded and unloaded and clamped, which affects the processing efficiency. In addition, due to the needs of different types of pipes and different usage scenarios, the bending radius parameters of the bent pipes change frequently. Frequent changes in the bending processing parameters require manual replacement of wheel molds of different sizes for processing and forming, which affects the processing efficiency. For this reason, we provide a pipe bending machine that can cut the pipe to a fixed length after bending and has the function of conveniently adjusting the bending radius. Utility Model Content

[0004] The utility model aims to provide a fixed-length cutting pipe bending machine to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed-length cutting pipe bending machine, comprising a pipe bending disk, a clamping feeding device and a frame, the outer side of the pipe bending disk is opened and closed and connected with an external fixing plate, when the external fixing plate presses the pipe fitting to fit the outer side of the pipe bending disk, the pipe bending disk rotates to bend the pipe, an opening and closing driving assembly is provided between the pipe bending disk and the external fixing plate, an adjusting slide is extended and arranged on the frame on one side of the pipe bending disk, a servo roller is slidably connected to the adjusting slide, a servo motor is installed at the bottom of the servo roller, a telescopic rod for driving the servo roller to translate is installed in parallel on the outer side of the adjusting slide, a metal strip is wound on the outer side of the servo roller, an insertion rod is provided at the end of the metal strip away from the servo roller, and a slot for connecting the insertion rod is provided on the pipe bending disk, and the pipe bending disk winds or unwinds the metal strip to adjust the bending radius of the pipe bending disk.

[0006] A cutting machine is slidably connected to a frame on one side of the pipe bending disk close to the clamping and feeding device. A linkage component is provided between the cutting machine and the servo roller. When the telescopic rod is extended or retracted, the cutting machine is driven to vertically cut the pipe.

[0007] Preferably, the opening and closing drive assembly includes a pair of drive arms hinged to the upper and lower ends of the bending tube disk, one end of each of the drive arms is movably connected to the side position of the external fixed plate, a hydraulic cylinder is hinged on the bending tube disk at the other end of the drive arm, and the output end of the hydraulic cylinder is hinged to the drive arm arrangement.

[0008] Preferably, the linkage assembly includes a slide groove arranged on the top of the frame, the outer side of the cutting machine is connected to a length adjustment plate, the outer side of the servo motor is connected to a connecting plate arranged parallel to and laterally overlapping the length adjustment plate, the length adjustment plate is provided with an installation groove along its length direction, and a fixing bolt is provided between the length adjustment plate and the connecting plate.

[0009] Preferably, a debris collection box is provided at the bottom end of the outer wall of the frame at the cutting machine position, and a collection bucket is obliquely arranged on the frame below the cutting machine. The collection bucket is connected to the outer shell of the cutting machine, and an opening for the movable use of the collection bucket is provided on the frame.

[0010] Preferably, the metal strip is a stainless steel strip.

[0011] Preferably, a pair of slide rails for fixing the clamping and feeding device are installed on the top of the frame, a screw rod is installed on the frame between the two slide rails through a bearing, one end of the screw rod is connected to a driving motor, the bottom of the clamping and feeding device is respectively connected to the slide rail and the screw rod, and a pneumatic clamp for fixing the pipe is installed on the clamping and feeding device.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the fixed-length cutting pipe bending machine can be used in combination with the servo roller, the metal strip and the detachable connecting structure of the pipe bending disk. The metal strip can be wound or unwound according to production needs and then connected to the outside of the pipe bending disk to change the bending radius of the pipe bending disk. The adjustment of the pipe bending parameters can be quickly met, the convenience and production efficiency can be increased, and the servo roller and the cutting machine can be driven by the telescopic rod for translation. On the one hand, the translational cutting machine can be displaced within a small range and then combined with the feeding of the pipe to achieve fixed-length cutting. On the other hand, it can drive the servo roller to move to avoid affecting the bending and obstruction of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view schematic diagram of the internal structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the pipe bending disc of the utility model;

[0015] Figure 3 This is an enlarged schematic diagram of the structure of the cutting machine of the utility model from top view;

[0016] Figure 4It is a schematic diagram of the top view of the structure of the external fixing plate of the utility model.

[0017] In the figure: 1. External fixing plate; 2. Bending tube plate; 3. Debris collecting box; 4. Telescopic rod; 5. Servo roller; 6. Adjusting slide plate; 7. Connecting plate; 8. Length adjusting plate; 9. Cutting machine; 10. Clamping feeding device; 11. Screw rod; 12. Slide rail; 13. Frame; 14. Insert rod; 15. Metal strip; 16. Slot; 17. Collecting bucket; 18. Hydraulic cylinder; 19. Driving arm. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides an embodiment: a fixed-length cutting pipe bending machine, including a pipe bending plate 2, a clamping and feeding device 10 and a frame 13. The specific structure of the clamping and feeding device 10 can be understood by those skilled in the art. It is mainly used to clamp and fix the pipe fittings and realize the purpose of feeding and feeding. The spindle box and three-jaw chuck used in the CNC lathe in the prior art can meet the use. Basically, a pair of slide rails 12 for fixing the clamping and feeding device 10 are installed on the top of the frame 13, and a screw 11 is installed on the frame 13 between the two slide rails 12 through a bearing. One end of the screw 11 is connected to a driving motor, and the bottom of the clamping and feeding device 10 is respectively connected to the slide rail 12 and the screw 11. The bottom of the clamping and feeding device 10 is provided with a threaded hole adapted to the screw 11. When the driving motor rotates forward and reversely, it can drive the clamping and feeding device 10 to move forward and backward along the direction of the screw 11. The clamping of the pipe should be based on the pneumatic clamping jaws installed on the clamping and feeding device 10 for fixing the pipe. The interior of the clamping and feeding device 10 is provided with a rotating motor for driving the pneumatic clamping jaws to rotate, which will not be elaborated here.

[0020] In order to realize the pipe bending effect produced by the rotation of the pipe bending disc 2, the outer side of the pipe bending disc 2 is connected to the outer fixing plate 1, and the outer fixing plate 1 revolves with the rotation of the pipe bending disc 2. When the outer fixing plate 1 presses the pipe fitting to fit the outer side of the pipe bending disc 2, the pipe bending disc 2 rotates to bend the pipe. An opening and closing driving component is provided between the pipe bending disc 2 and the outer fixing plate 1. In this embodiment, the opening and closing driving component can include a pair of driving arms 19 hinged at the upper and lower ends of the pipe bending disc 2, and one end of the two driving arms 19 is movably connected to the outer fixing plate 1. At the side position of the driving arm 19, a hydraulic cylinder 18 is hinged on the bending disk 2 at the other end of the driving arm 19, and the output end of the hydraulic cylinder 18 is hinged to the driving arm 19. As those skilled in the art can understand, the opening and closing driving assembly can also be directly connected to the external fixed plate 1 through the hydraulic telescopic part arranged perpendicular to the bending disk 2, and its telescopic part can also realize the opening and closing of the external fixed plate 1. The hinged structure of the driving arm 19 provided in the present application can change the direction of the clamping force, reduce the force on the hydraulic cylinder and improve the clamping strength.

[0021] An adjusting slide 6 is extended and arranged on the frame 13 on one side of the pipe bending disk 2, and a servo roller 5 is slidably connected to the adjusting slide 6. The sliding guide of the adjusting slide 6 allows the servo roller 5 to slide along the adjusting slide 6 according to the position that the bending end face of the bent pipe may occupy and then be used for avoidance. A servo motor is installed at the bottom of the servo roller 5, and a telescopic rod 4 for driving the servo roller 5 to translate is installed in parallel on the outer side of the adjusting slide 6. A metal strip 15 is wound on the outer side of the servo roller 5, and the metal strip 15 can be a stainless steel strip. The servo motor is used to control the rotation of the servo roller 5 to adjust the tension of the metal strip 15. The tension control can be achieved by adding a torque sensor based on the output end of the motor. An insert rod 14 is provided at the end of the metal strip 15 away from the servo roller 5, and the pipe bending disk 2 is provided with a slot 16 for connecting the plug rod 14. The bending disk 2 is wound or unwound with the metal strip 15 to adjust the bending radius of the bending disk 2. The thickness of the metal strip 15 should be as thin as possible to avoid excessive change in circumferential thickness after winding, which affects the smoothness of the bending radius of the tube. The change in the bending radius of the tube generated by the winding of the metal strip 15 in the present application can also enable the tube to be better bent and reduce the effect of reducing the wall thickness of the rear section of the tube. The rotation of the bending disk 2 can be driven by a motor and / or a hydraulic drive. Since the bending disk 2 needs to achieve continuous rotation in the same direction, the hydraulic drive of the bending disk 2 can be a hydraulic turntable, and the bending disk 2 should be detachably connected to the main shaft of its rotation drive by plugging, etc., for easy replacement or maintenance.

[0022] A cutting machine 9 is slidably connected to the frame 13 on the side of the bending tube plate 2 close to the clamping feeding device 10, and a linkage component is provided between the cutting machine 9 and the servo roller 5. The linkage component is used to drive the cutting machine 9 to vertically cut the pipe when the telescopic rod 4 is extended or retracted. In this embodiment, the linkage component can be a slide groove arranged on the top of the frame 13, and a length adjustment plate 8 is connected to the outer side of the cutting machine 9. A connecting plate 7 parallel to and laterally overlapping the length adjustment plate 8 is connected to the outer side of the servo motor. The length adjustment plate 8 is provided with a mounting groove along its length direction, and a fixing bolt is provided between the length adjustment plate 8 and the connecting plate 7.

[0023] Furthermore, based on the movable characteristics of the cutting machine 9 during cutting and the fact that debris will be generated during cutting, as an extension of the present application, a debris collection box 3 is provided at the bottom end of the outer wall of the frame 13 at the cutting machine 9, and a collecting bucket 17 is arranged obliquely on the frame 13 below the cutting machine 9, the collecting bucket 17 is connected to the outer shell of the cutting machine 9, and an opening for the movable use of the collecting bucket 17 is provided on the frame 13. When the cutting machine 9 is reset, the collecting bucket 17 should be kept retracted to one side of the frame 13 to avoid affecting the movement of the clamping and feeding device 10, and extended with the cutting machine 9 during cutting, so that the top end of the collecting bucket 17 covers the screw 11 and the bottom end is located within the opening interval of the collecting box 3.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A fixed-length cutting pipe bending machine, comprising a pipe bending disc (2), a clamping and feeding device (10) and a frame (13), wherein the outer side of the pipe bending disc (2) is openably connected to an outer fixing plate (1), and when the outer fixing plate (1) presses the pipe fitting to fit the outer side of the pipe bending disc (2), the pipe bending disc (2) rotates to bend the pipe, characterized in that: An opening and closing drive assembly is provided between the pipe bending disk (2) and the outer fixing plate (1); an adjusting slide plate (6) is extended and arranged on a frame (13) on one side of the pipe bending disk (2); a servo roller (5) is slidably connected to the adjusting slide plate (6); a servo motor is installed at the bottom of the servo roller (5); a telescopic rod (4) is installed in parallel on the outer side of the adjusting slide plate (6) for driving the servo roller (5) to translate; a metal strip (15) is wound on the outer side of the servo roller (5); an insertion rod (14) is provided at one end of the metal strip (15) away from the servo roller (5); and a slot (16) for connecting the insertion rod (14) is provided on the pipe bending disk (2); the pipe bending disk (2) winds or unwinds the metal strip (15) for adjusting the bending radius of the pipe bending disk (2); A cutting machine (9) is slidably connected to a frame (13) on the side of the pipe bending disk (2) close to the clamping and feeding device (10), and a linkage component is provided between the cutting machine (9) and the servo roller (5). When the telescopic rod (4) is extended or retracted, the cutting machine (9) is driven to vertically cut the pipe.

2. A fixed-length cutting pipe bending machine according to claim 1, characterized in that: The opening and closing drive assembly comprises a pair of drive arms (19) hinged to the upper and lower ends of the bending tube disc (2), one end of each of the two drive arms (19) is movably connected to the side position of the outer fixing plate (1), and a hydraulic cylinder (18) is hinged to the bending tube disc (2) at the other end of each of the drive arms (19), and the output end of the hydraulic cylinder (18) is hinged to the drive arm (19).

3. A cut-to-length pipe bending machine according to claim 1, characterized in that: The linkage assembly comprises a slide groove arranged on the top of the frame (13); the outer side of the cutting machine (9) is connected to a length adjustment plate (8); the outer side of the servo motor is connected to a connecting plate (7) arranged parallel to and laterally overlapping the length adjustment plate (8); the length adjustment plate (8) is provided with a mounting groove along its length direction; and fixing bolts are provided between the length adjustment plate (8) and the connecting plate (7).

4. A cut-to-length pipe bending machine according to claim 3, characterized in that: A debris collection box (3) is provided at the bottom end of the outer side wall of the frame (13) at the cutting machine (9), and a collection bucket (17) is obliquely arranged on the frame (13) below the cutting machine (9), the collection bucket (17) is connected to the outer shell of the cutting machine (9), and an opening for the movable use of the collection bucket (17) is provided on the frame (13).

5. A cut-to-length pipe bending machine according to claim 1, characterized in that: The metal strip (15) is a stainless steel strip.

6. A cut-to-length pipe bending machine according to claim 1, characterized in that: A pair of slide rails (12) for fixing the clamping and feeding device (10) are installed on the top of the frame (13), a screw rod (11) is installed on the frame (13) between the two slide rails (12) through a bearing, one end of the screw rod (11) is connected to a driving motor, the bottom of the clamping and feeding device (10) is respectively connected to the slide rail (12) and the screw rod (11), and a pneumatic clamping claw for fixing the pipe is installed on the clamping and feeding device (10).

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