Pipe bending die for pipe bender

Abstract

This invention discloses a pipe bending die for a pipe bending machine in the field of mechanical equipment technology. The die includes a worktable with multiple circumferentially arranged die rings. An intermediate die is set between two adjacent die rings, and the intermediate die includes an upper die and a lower die, with the radius of curvature of the upper die being smaller than that of the lower die. The outer wall of the upper die has a first upper groove and a second upper groove, and the outer wall of the lower die has a first lower groove and a second lower groove. The outer circumferential wall of the die rings has a first bending groove and a second bending groove. The groove shapes of the first upper groove and the first lower groove are the same as the groove shape of the first bending groove, and the groove shapes of the second upper groove and the second lower groove are the same as the groove shape of the second bending groove. The die rings are provided with a rotating mechanism to drive their rotation, and the worktable is provided with a displacement mechanism and a lifting mechanism. The lifting mechanism is used to drive the intermediate die to rise and fall, and the displacement mechanism is used to drive the multiple die rings to synchronously move radially. The advantage of this invention is that it can simultaneously meet the pipe bending requirements of different bending radii and different groove shapes.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment technology, and in particular to a pipe bending mold for a pipe bending machine. Background Technology

[0002] Traditional pipe bending dies are mostly dedicated fixed structures, and a set of die rings is usually only suitable for one pipe diameter, one cross-sectional shape, and one bending radius. When it is necessary to process pipes with different diameters, different cross-sectional shapes, or different bending requirements, it is often necessary to stop the machine and replace the entire set of die rings or dies.

[0003] Although some adjustable pipe bending dies have appeared in the prior art, for example, Chinese utility model patent with authorization announcement number CN207308654U discloses a pipe bending machine wheel mold ring, which includes a rigid annular mold ring body, a mold ring tube placement groove arranged along the circumference of the mold ring body, and an inner mounting post protruding radially from the inner edge of the mold ring body. Through the cooperation between the inner mounting post and the mold ring mounting port and the outer mounting port, multiple wheel mold rings and wheel mold cores can be spliced ​​into a circular structure with different radii to adapt to the bending requirements of different bending radii.

[0004] However, the existing mold ring in the pipe placement groove is a single annular groove with a fixed groove shape. The same mold ring can only be adapted to one type of pipe cross-sectional shape or bending groove shape. When different groove shapes of pipe fittings need to be processed, the mold still needs to be changed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a pipe bending die for a pipe bending machine that can simultaneously meet the pipe bending requirements of different bending radii and different groove shapes.

[0006] To achieve the above-mentioned objectives, the pipe bending die for this pipe bending machine adopts the following technical solution:

[0007] A pipe bending die for a pipe bending machine includes a worktable with multiple circumferentially arranged die rings forming a circle, each die ring being a ring-shaped structure; an intermediate die is provided between two adjacent die rings, the intermediate die including an upper die and a lower die; the upper die and the lower die are both arc-shaped and concentrically arranged, the radius of curvature of the upper die being smaller than the radius of curvature of the lower die;

[0008] The outer wall of the upper mold is provided with a first upper groove and a second upper groove arranged vertically, and the outer wall of the lower mold is provided with a first lower groove and a second lower groove arranged vertically; the outer peripheral wall of the mold ring is provided with a first bent pipe groove and a second bent pipe groove, the first bent pipe groove is located on the outer wall of one semicircular segment of the mold ring, and the second bent pipe groove is located on the outer wall of the other semicircular segment of the mold ring, and the groove shapes of the first bent pipe groove and the second bent pipe groove are different; the groove shapes of the first upper groove and the first lower groove are the same as the groove shape of the first bent pipe groove, and the groove shapes of the second upper groove and the second lower groove are the same as the groove shape of the second bent pipe groove;

[0009] The die ring is equipped with a rotation mechanism to drive its rotation, and the worktable is equipped with a displacement mechanism and a lifting mechanism. The lifting mechanism is used to drive the intermediate die to rise and fall. The displacement mechanism is used to drive multiple die rings to synchronously move radially, so as to adjust the diameter of the circle formed by the multiple die rings and make the circle formed by the multiple die rings have a minimum diameter state and a maximum diameter state. When the circle formed by the multiple die rings is in the minimum diameter state, the lifting mechanism drives the upper die to move between two adjacent die rings. When the circle formed by the multiple die rings is in the maximum diameter state, the lifting mechanism drives the lower die to move between two adjacent die rings.

[0010] Preferably, the displacement assembly includes a lead screw, a lead screw nut, a gear set, and a displacement motor; the die ring is rotatably mounted on a mounting base, the worktable is provided with a guide rail groove, the mounting base is capable of radial movement along the guide rail groove of the worktable, and the mounting base is provided with a slider slidably mounted in the guide rail groove; the lead screw is rotatably mounted on the worktable, and the mounting base is provided with a lead screw nut that meshes with the lead screw; the gear set includes a driving bevel gear and a driven bevel gear, the displacement motor is mounted on the worktable, the output shaft of the displacement motor is connected to the driving bevel gear, one end of the lead screw is provided with a driven bevel gear, and the driving bevel gear and the driven bevel gear mesh with each other.

[0011] Preferably, the rotating mechanism includes a rotary motor mounted on a mounting base, the output shaft of the rotary motor being connected to a first gear, and the mold ring having a second gear, with the first gear and the second gear meshing with each other.

[0012] Preferably, the lifting mechanism includes a lifting cylinder mounted on the workbench, a slide block at the bottom of the intermediate mold, a vertically arranged slide groove on the workbench, and the slide block slidably mounted in the slide groove; the cylinder of the lifting cylinder is fixed on the workbench, and the piston rod of the lifting cylinder is connected to the slide block.

[0013] Preferably, the first bend groove, the first upper groove, and the first lower groove are all arc-shaped, while the second bend groove, the second upper groove, and the second lower groove are all square-shaped. The fact that the first bend groove, the first upper groove, and the first lower groove are all arc-shaped, and the second bend groove, the second upper groove, and the second lower groove are all square, allows the same mold to accommodate both arc-shaped cross-sections such as round pipes and square cross-sections such as square pipes, thus expanding its applicability.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention drives multiple die rings to synchronously move radially through a displacement mechanism, allowing the circle formed by the multiple die rings to be adjusted between the minimum and maximum diameter states. This eliminates the need to replace the entire set of die rings to accommodate different bending radii. Simultaneously, by utilizing the different first and second bending grooves on the two semicircular segments of the die rings, as well as the corresponding grooves on the upper and lower dies, and switching between the upper and lower dies in the minimum and maximum diameter states via a lifting mechanism, and cooperating with a rotation mechanism, different groove types can be processed for bending. This allows the same die to accommodate bending requirements for different bending radii and different pipe groove types, thus improving its applicability. Attached Figure Description

[0016] Figure 1 This is a diagram showing the state of the bent pipe.

[0017] Figure 2 This is a schematic diagram of the mold ring of the present invention in its maximum diameter state;

[0018] Figure 3 for Figure 2 AA cross-section view;

[0019] Figure 4 for Figure 3 Enlarged view of part E;

[0020] Figure 5 This is a schematic diagram of the die ring in its minimum diameter state;

[0021] Figure 6 for Figure 5 BB cross-section;

[0022] Figure 7 for Figure 2 CC cross-section;

[0023] Figure 8 for Figure 5 DD cross-sectional view.

[0024] The components include: 1. Workbench; 2. Pipe; 3. Mold ring; 301. First bend groove; 302. Second bend groove; 4. Lower mold; 401. First lower groove; 402. Second lower groove; 5. Lead screw nut; 6. Mounting base; 7. Lead screw; 8. Driven bevel gear; 9. Driven bevel gear; 10. Displacement motor; 11. Second gear; 12. First gear; 13. Rotary motor; 14. Guide rail groove; 15. Slider; 16. Upper mold; 1601. First upper groove; 1602. Second upper groove; 17. Slide groove; 18. Slide seat; 19. Lifting cylinder. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0026] like Figure 1-8As shown, a pipe bending die for a pipe bending machine includes a worktable 1. The worktable 1 has multiple circumferentially arranged die rings 3 forming a circle, each die ring 3 being a circular structure. An intermediate die is provided between adjacent die rings 3, the intermediate die including an upper die 16 and a lower die 4. Both the upper die 16 and the lower die 4 are arc-shaped and concentrically arranged, with the radius of curvature of the upper die 16 being smaller than that of the lower die 4. The outer wall of the upper die 16 has a first upper groove 1601 and a second upper groove 1602 arranged vertically. The outer wall of mold 4 is provided with a first lower groove 401 and a second lower groove 402 arranged vertically; the outer peripheral wall of mold ring 3 is provided with a first bent pipe groove 301 and a second bent pipe groove 302. The first bent pipe groove 301 is located on the outer wall of one semicircular segment of mold ring 3, and the second bent pipe groove 302 is located on the outer wall of the other semicircular segment of mold ring 3, and the groove shapes of the first bent pipe groove 301 and the second bent pipe groove 302 are different; the groove shapes of the first upper groove 1601 and the first lower groove 401 are the same as those of the first bent pipe groove 401. The grooves of 01 are the same, and the grooves of the second upper groove 1602 and the second lower groove 402 are the same as the grooves of the second bent pipe groove 302; the grooves of the first bent pipe groove 301, the first upper groove 1601 and the first lower groove 401 are all set to arc shape, and the grooves of the second bent pipe groove 302, the second upper groove 1602 and the second lower groove 402 are all set to square shape; the mold ring 3 is provided with a rotating mechanism to drive its rotation, and the worktable 1 is provided with a displacement mechanism and a lifting mechanism. The lifting mechanism is used to drive the intermediate mold to lift; the displacement mechanism is used to drive the multiple mold rings 3 to synchronously radially displace, so as to adjust the diameter of the circle formed by the multiple mold rings 3 and make the circle formed by the multiple mold rings 3 have a minimum diameter state and a maximum diameter state; when the circle formed by the multiple mold rings 3 is in the minimum diameter state, the lifting mechanism drives the upper mold 16 to move between two adjacent mold rings 3; when the circle formed by the multiple mold rings 3 is in the maximum diameter state, the lifting mechanism drives the lower mold 4 to move between two adjacent mold rings 3.The displacement assembly includes a lead screw 7, a lead screw nut 5, a gear set, and a displacement motor 10; the mold ring 3 is rotatably mounted on the mounting base 6, the worktable 1 is provided with a guide rail groove 14, the mounting base 6 can move radially along the guide rail groove 14 of the worktable 1, and the mounting base 6 is provided with a slider 15 slidably mounted in the guide rail groove 14; the lead screw 7 is rotatably mounted on the worktable 1, and the mounting base 6 is provided with a lead screw nut 5 that mates with the lead screw 7; the gear set includes a driving bevel gear 9 and a driven bevel gear 8, the displacement motor 10 is mounted on the worktable 1, the output shaft of the displacement motor 10 is connected to the driving bevel gear 9, and one end of the lead screw 7 is provided with Driven bevel gear 8, driving bevel gear 9 and driven bevel gear 8 mesh with each other; the rotating mechanism includes a rotary motor 13 mounted on the mounting base 6, the output shaft of the rotary motor 13 is connected to the first gear 12, the mold ring 3 is provided with a second gear 11, the first gear 12 and the second gear 11 mesh with each other; the lifting mechanism includes a lifting cylinder 19 mounted on the worktable 1, the bottom of the intermediate mold is provided with a slide block 18, the worktable 1 is provided with a vertically arranged slide groove 17, the slide block 18 is slidably mounted in the slide groove 17; the cylinder of the lifting cylinder 19 is fixed on the worktable 1, and the piston rod of the lifting cylinder 19 is connected to the slide block 18.

[0027] The specific working process and principle of this invention are as follows: In use, based on the bending radius and groove requirements of the pipe to be bent, the displacement motor 10 first drives the lead screw 7 to rotate through the meshing of the active bevel gear 9 and the driven bevel gear 8. The lead screw nut 5 drives the mounting base 6 to move radially along the guide rail groove 14 of the worktable 1, causing multiple die rings 3 to move radially synchronously, thereby adjusting the diameter of the circle formed by the multiple die rings 3 to either the minimum or maximum diameter state. When in the minimum diameter state, the lifting cylinder 19 drives the intermediate die to rise and fall along the slide groove 17 through the slide block 18, causing the upper die 16 with a smaller radius of curvature to move between two adjacent die rings 3. When in the maximum diameter state... Then, the lower die 4 with a larger radius of curvature moves between two adjacent die rings 3, thus forming a continuous bending cavity together with the die rings 3. At the same time, according to the required groove shape, the rotating motor 13 drives the die ring 3 to rotate through the meshing of the first gear 12 and the second gear 11, so that the first bending groove 301 on one semicircular segment of the die ring 3 engages with the first upper groove 1601 or the first lower groove 401 of the corresponding groove shape on the intermediate die, and the second bending groove 302 on the other semicircular segment of the die ring 3 engages with the second upper groove 1602 or the second lower groove 402 of the corresponding groove shape on the intermediate die. Then, the pipe 2 to be bent is placed in the cavity, and the pipe 2 can be bent by the pipe bending machine.

[0028] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A pipe bending die for a pipe bending machine, characterized in that: The system includes a worktable with multiple circumferentially arranged mold rings forming a circle, each mold ring being a ring-shaped structure; an intermediate mold is provided between two adjacent mold rings, the intermediate mold including an upper mold and a lower mold; the upper mold and the lower mold are both arc-shaped and concentrically arranged, the radius of curvature of the upper mold being smaller than the radius of curvature of the lower mold; The outer wall of the upper mold is provided with a first upper groove and a second upper groove arranged vertically, and the outer wall of the lower mold is provided with a first lower groove and a second lower groove arranged vertically; the outer peripheral wall of the mold ring is provided with a first bent pipe groove and a second bent pipe groove, the first bent pipe groove is located on the outer wall of one semicircular segment of the mold ring, and the second bent pipe groove is located on the outer wall of the other semicircular segment of the mold ring, and the groove shapes of the first bent pipe groove and the second bent pipe groove are different; the groove shapes of the first upper groove and the first lower groove are the same as the groove shape of the first bent pipe groove, and the groove shapes of the second upper groove and the second lower groove are the same as the groove shape of the second bent pipe groove; The die ring is equipped with a rotation mechanism to drive its rotation, and the worktable is equipped with a displacement mechanism and a lifting mechanism. The lifting mechanism is used to drive the intermediate die to rise and fall. The displacement mechanism is used to drive multiple die rings to synchronously move radially, so as to adjust the diameter of the circle formed by the multiple die rings and make the circle formed by the multiple die rings have a minimum diameter state and a maximum diameter state. When the circle formed by the multiple die rings is in the minimum diameter state, the lifting mechanism drives the upper die to move between two adjacent die rings. When the circle formed by the multiple die rings is in the maximum diameter state, the lifting mechanism drives the lower die to move between two adjacent die rings.

2. The pipe bending die for a pipe bending machine according to claim 1, characterized in that: The displacement assembly includes a lead screw, a lead screw nut, a gear set, and a displacement motor; the mold ring is rotatably mounted on a mounting base, the worktable has a guide rail groove, the mounting base can move radially along the guide rail groove of the worktable, and the mounting base has a slider slidably mounted in the guide rail groove; the lead screw is rotatably mounted on the worktable, and the mounting base has a lead screw nut that meshes with the lead screw; the gear set includes a driving bevel gear and a driven bevel gear, the displacement motor is mounted on the worktable, the output shaft of the displacement motor is connected to the driving bevel gear, one end of the lead screw has a driven bevel gear, and the driving bevel gear and the driven bevel gear mesh with each other.

3. The pipe bending die for a pipe bending machine according to claim 2, characterized in that: The rotating mechanism includes a rotary motor mounted on a mounting base. The output shaft of the rotary motor is connected to a first gear, and the mold ring is provided with a second gear. The first gear and the second gear mesh with each other.

4. The pipe bending die for a pipe bending machine according to claim 1, characterized in that: The lifting mechanism includes a lifting cylinder mounted on the workbench, a slide block at the bottom of the intermediate mold, and a vertically arranged slide groove on the workbench, with the slide block slidably installed in the slide groove; the cylinder barrel of the lifting cylinder is fixed on the workbench, and the piston rod of the lifting cylinder is connected to the slide block.

5. The pipe bending die for a pipe bending machine according to claim 1, characterized in that: The first bend groove, the first upper groove, and the first lower groove are all arc-shaped, while the second bend groove, the second upper groove, and the second lower groove are all square-shaped.

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