Bent pipe winding die

Abstract

The invention discloses a bent pipe winding die. The bent pipe winding die comprises a supporting body, a center shaft adjusting device and a bent pipe fixing device. The supporting main body comprises a supporting base and a supporting cover plate; the center shaft adjusting device comprises a center shaft body, a guide rail body and an angle sliding rod, one end of the angle sliding rod is connected with the hinge seat, the other end of the angle sliding rod is hinged to the center shaft body, a guide rail clamping block is hinged to one end of the center shaft body, and the guide rail clamping block is connected with the guide rail sliding block; the bent pipe fixing device comprises a first-direction driving sliding block and a second-direction driving sliding block, a first rack is arranged on one side of the first-direction driving sliding block and meshed with the outer gear, and a second rack is arranged on one side of the second-direction driving sliding block and meshed with the inner gear. The first-direction driving sliding block and the second-direction driving sliding block are connected with a driving assembly, and the first-direction driving sliding block and the second-direction driving sliding block are both connected with bent pipe clamping blocks through transmission assemblies. The bending pipe winding device can assist a bending pipe in fiber winding.

Description

Technical Field

[0001] The invention relates to the technical field of bent pipe winding equipment, in particular to a bent pipe winding mould. Background Art

[0002] Compared with traditional plastic elbows and metal elbows, carbon fiber composite elbows have the advantages of high modulus, high strength, good corrosion resistance, and long life. They are widely used in aerospace, marine development, oil extraction and smelting, building water supply and drainage, chemical industry, food processing and other fields. Fiber winding molding technology is an advanced manufacturing technology that uses winding machine equipment to control the relative movement between the wire nozzle and the core mold, and evenly and stably winds the resin-impregnated fiber yarn on the surface of the core mold according to a certain rule, and then solidifies and molds it to meet the requirements of mechanical properties. Compared with other composite material molding processes, the elbows produced by fiber winding molding technology have the advantages of high efficiency, low cost, and high product strength. It is an ideal method for producing elbows and their joints.

[0003] At present, composite pipe bends are usually formed by laying, winding or hand lay-up. Specifically, the prepreg composite material is laid or wound on the outer surface of the forming mold in a certain layer sequence. Since the pipe bend is not a rotating part, it cannot be directly fixed on the winding machine using an axis.

[0004] Therefore, there is an urgent need in the art for a curved tube winding die to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a bent pipe winding die to solve the problems existing in the above-mentioned prior art and to enable the bent pipe to be wound with fibers on a winding machine.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention discloses a bent pipe winding die, comprising a winding die main body, the winding die main body comprising a supporting body, a central axis adjusting device and a bent pipe fixing device, the central axis adjusting device and the bent pipe fixing device are respectively installed on both sides of the supporting body;

[0008] The support body includes a support base and a support cover plate, and the support cover plate is fixed to one side of the support base;

[0009] The central axis adjustment device comprises a central axis body, a guide rail body and an angle slide bar, wherein the guide rail body is fixed to the support cover plate, an articulated seat is fixed to one end of the guide rail body, and a guide rail slider is slidably connected to the other end of the guide rail body, one end of the angle slide bar is connected to the articulated seat, and the other end of the angle slide bar is hinged to the central axis body, and a guide rail clamping block is hinged to one end of the central axis body, and the guide rail clamping block is connected to the guide rail slider;

[0010] The bent pipe fixing device includes two first direction driving sliders, two second direction driving sliders, an outer gear and an inner gear. The two first direction driving sliders are arranged opposite to each other, and the two second direction driving sliders are arranged opposite to each other. A first rack is provided on the side of the two first direction driving sliders close to the supporting cover plate, and the first rack is meshed with the outer gear. A second rack is provided on the side of the two second direction driving sliders away from the supporting cover plate, and the second rack is meshed with the inner gear. The first direction driving slider and the second direction driving slider are connected with a driving assembly, and the driving device is used to drive the first direction driving slider and the second direction driving slider to perform reciprocating linear movement. The first direction driving slider and the second direction driving slider are both connected to a bent pipe clamping block through a transmission assembly, and the four bent pipe clamping blocks are used to clamp one end of the bent pipe body.

[0011] Preferably, the support base is a cylindrical structure, and the support cover is fixed to one end of the support base by screws.

[0012] Preferably, a slide groove is provided in the angle slide bar, two hinge seats are provided, each hinge seat is provided with a hinge hole, and the slide groove is located between the two hinge holes;

[0013] It also includes an angle adjustment bolt and an angle adjustment nut. The angle adjustment bolt passes through the hinge hole and the slide groove in sequence and is threadedly connected with the angle adjustment nut.

[0014] Preferably, the central axis body is provided with a plurality of positioning holes, and angle adjustment slip rings are installed at the positioning holes through positioning screws, and one end of the angle slide rod away from the hinge seat is hinged to the angle adjustment slip ring through an angle adjustment pin.

[0015] Preferably, the guide rail clamping block and the guide rail sliding block are fixedly connected by a position fixing screw.

[0016] Preferably, the drive assembly includes two screws and two sliding rods, the two screws are respectively threadedly connected to one first direction drive slider and one second direction drive slider, and the two sliding rods are respectively slidingly connected to another first direction drive slider and another second direction drive slider.

[0017] Preferably, a manual adjustment block is provided at one end of the screw rod, a manual adjustment through hole is provided on the side wall of the support base, and the manual adjustment block passes through the manual adjustment through hole.

[0018] Preferably, the transmission assembly comprises a passive slider, a side of the passive slider close to the support cover is provided with an oblique protrusion, a side of the first direction driving slider and the second direction driving slider away from the support cover is provided with an oblique groove, and the oblique protrusion is slidably connected to the oblique groove;

[0019] Four limiting sliding grooves are arranged on the side wall of the support base, and the passive sliding block is slidably connected in the limiting sliding grooves.

[0020] Preferably, a mounting groove is provided on a side of the passive sliding block away from the oblique protrusion, a clamping connection block is fixed in the mounting groove, and the clamping connection block is fixedly connected to the elbow clamping block.

[0021] Preferably, the cross-sectional shape of the curved pipe body is circular or elliptical.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention uses two sets of first-direction driving sliders and two sets of second-direction driving sliders to drive the four elbow clamping blocks to move. It is not only suitable for common circular cross-section elbows, but also can be used for elliptical cross-section elbows. For different cross-section sizes, it can be adjusted by screws to meet the clamping requirements. The central axis adjustment device is designed for the angle of the elbow body. The deflection angle between the central axis body and the elbow body can be adjusted by the central axis adjustment device to adapt to elbow bodies of different angles; changing the relative position between the central axis body and the elbow body can reduce the impact and centrifugal force during winding, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1This is a schematic structural diagram of a pipe bending winding die according to an embodiment of the present invention;

[0026] Figure 2 It is a partial schematic diagram of the elbow winding mold after the support cover plate is removed in the embodiment of the present invention;

[0027] Figure 3 It is a partial schematic diagram of the bending tube winding mold after the support base is removed in the embodiment of the present invention;

[0028] In the figure: 1-bend pipe body; 2-support base; 3-support cover plate; 4-bend pipe clamping block; 5-guide rail body; 6-angle adjustment bolt; 7-angle slide rod; 8-angle adjustment nut; 9-angle adjustment pin; 10-angle adjustment slip ring; 11-center shaft body; 12-center shaft pin; 13-position fixing screw; 14-guide rail clamping block; 15-clamping connection block; 16-guide rail slider; 17-external gear; 18-internal gear; 19-screw; 20-manual adjustment block; 21-first direction driving slider; 22-second direction driving slider; 23-slide rod; 24-passive slider. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a bent pipe winding die to solve the problems existing in the above-mentioned prior art and to enable the bent pipe to be wound with fibers on a winding machine.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1-Figure 3 As shown, this embodiment provides a bending tube winding mold, including a winding mold body, the winding mold body is provided with two groups, and the two groups of winding mold bodies are respectively installed at both ends of the bending tube body 1. Each winding mold body includes a supporting body, a central axis adjustment device and a bending tube fixing device, and the central axis adjustment device and the bending tube fixing device are respectively installed on both sides of the supporting body.

[0033] The supporting body includes a supporting base 2 and a supporting cover plate 3 , and the supporting cover plate 3 is fixed to one side of the supporting base 2 .

[0034] For the central axis adjustment device, Figure 1As shown, the central axis adjustment device includes a central axis body 11, a guide rail body 5 and an angle slide bar 7. The guide rail body 5 is fixed to the support cover plate 3 by screws, one end of the guide rail body 5 is fixed with a hinge seat, and the other end of the guide rail body 5 is slidably connected with a guide rail slider 16, and the guide rail slider 16 can perform reciprocating linear sliding on the guide rail body 5. One end of the angle slide bar 7 is connected to the hinge seat, and the other end of the angle slide bar 7 is hinged to the central axis body 11. One end of the central axis body 11 is hinged with a guide rail clamping block 14 through a central axis pin 12, and the guide rail clamping block 14 is connected to the guide rail slider 16, and the other end of the central axis body 11 is connected to the winding machine (it can also be understood that the central axis body 11 itself is a part of the winding machine).

[0035] like Figure 2-Figure 3 As shown, the elbow fixing device includes two first direction driving sliders 21, two second direction driving sliders 22, an outer gear 17 and an inner gear 18. Among them, the two first direction driving sliders 21 are arranged opposite to each other, and the two second direction driving sliders 22 are arranged opposite to each other, and the two first direction driving sliders 21 and the two second direction driving sliders 22 are respectively distributed according to the positions of the four sides of the square. Among them, the two first direction driving sliders 21 are provided with a first rack on the side close to the support cover plate 3, and the two first racks are respectively meshed with the two sides of the outer gear 17. Similarly, the two second direction driving sliders 22 are provided with a second rack on the side away from the support cover plate 3, and the two second racks are meshed with the two sides of the inner gear 18. It should be noted here that the outer gear 17 is closer to the support cover plate 3 than the inner gear 18, and the outer gear 17 and the inner gear 18 are relatively independent, and the rotation of the two does not affect each other. In order to further realize that the rotation of the two does not affect each other, a thrust ball bearing can also be provided between the two to achieve the connection between the two. The first direction driving slider 21 and the second direction driving slider 22 are connected with a driving assembly, and the driving device is used to drive the first direction driving slider 21 and the second direction driving slider 22 to reciprocate and linearly move. The first direction driving slider 21 and the second direction driving slider 22 are both connected with a pipe bending clamping block 4 through a transmission assembly. When the first direction driving slider 21 and the second direction driving slider 22 move linearly, the corresponding pipe bending clamping block 4 will be driven to move, so that the four pipe bending clamping blocks 4 are used to clamp one end of the pipe bending body 1.

[0036] In actual use, the winding mold body is first installed on the winding machine. Since the central axis body 11 is generally an inherent part of the winding machine, the winding mold body generally does not need to be removed from the winding machine. Then take the curved tube body 1 that needs to be wound with fibers, place it between the two winding mold bodies, and then start the drive assembly. The first direction drive slider 21 and the second direction drive slider 22 are driven by the drive assembly to move accordingly, so as to drive the four curved tube clamping blocks 4 to move accordingly, so as to clamp the two ends of the curved tube body 1. After clamping the curved tube body 1, the staff can adjust the position of the guide rail slider 16 on the guide rail body 5, that is, adjust the relative position of the central axis body 11 and the curved tube body 1, so as to reduce the impact and centrifugal force during winding, thereby improving the product quality. By adjusting the angle slider 7, the angle between the central axis body 11 and the guide rail body 5 can be changed to adapt to the curved tube body 1 of different angles. When the position and angle are adjusted, the winding machine can be turned on for fiber winding.

[0037] In this embodiment, the support base 2 is a cylindrical structure, and one end of the support base 2 is sealed and the other end is open. The support cover 3 is fixed to the open end of the support base 2 by screws, and the sealed end of the support base 2 is also provided with four through holes for the elbow clamping block 4 to pass through.

[0038] In this embodiment, a long sliding groove is provided in the angle slide bar 7, two hinge seats are provided, and a gap is provided between the two hinge seats, and a hinge hole is provided on each hinge seat, and the sliding groove on the angle slide bar 7 is located between the two hinge holes.

[0039] In order to realize the connection between the hinge seat and the angle slide rod 7, an angle adjustment bolt 6 and an angle adjustment nut 8 are also included. The angle adjustment bolt 6 passes through the hinge hole and the slide groove in sequence and is threadedly connected with the angle adjustment nut 8.

[0040] When the angle between the central shaft body 11 and the guide rail body 5 needs to be adjusted, the angle adjustment nut 8 can be loosened first to make the angle slide bar 7 in a relatively active state, and then the angle between the central shaft body 11 and the guide rail body 5 can be adjusted. In the process of adjusting the angle between the central shaft body 11 and the guide rail body 5, the inclination angle of the angle slide bar 7 and the relative position of the slide slot and the hinge seat will change accordingly, but the slide slot will still be between the two hinge holes. When the angle between the central shaft body 11 and the guide rail body 5 is adjusted to the expected position, the angle adjustment nut 8 can be tightened again to fix the angle slide bar 7, and further fix the angle between the central shaft body 11 and the guide rail body 5.

[0041] In this embodiment, the central axis body 11 is provided with a plurality of positioning holes, specifically two. Of course, those skilled in the art can also adjust the number of positioning holes and their distribution positions according to actual needs. An angle adjustment slip ring 10 is installed at the positioning hole through a positioning screw. Specifically, the angle adjustment slip ring 10 is sleeved on the outside of the central axis body 11, and then the positioning screw is passed through the angle adjustment slip ring 10 and the positioning hole in sequence. The end of the angle slide rod 7 away from the hinge seat is hinged to the angle adjustment slip ring 10 through the angle adjustment pin 9, so as to adjust the angle between the central axis body 11 and the guide rail body 5.

[0042] In this embodiment, the guide rail clamping block 14 and the guide rail slider 16 are fixedly connected by the position fixing screw 13. The reason why the position fixing screw 13 is used to fix the guide rail clamping block 14 and the guide rail slider 16 is to enable the guide rail clamping block 14 and the guide rail slider 16 to be fixed at a certain position on the guide rail body 5 to prevent them from sliding. Figure 1 It is not difficult to see that a protrusion extends inward from both sides of the opening on the guide rail body 5, and the guide rail slider 16 is an inverted T-shaped block, a part of which extends out from between the two protrusions and is fixedly connected to the guide rail clamping block 14. When the guide rail clamping block 14 and the guide rail slider 16 need to slide on the guide rail body 5, it is only necessary to loosen the position fixing screw 13; when the guide rail clamping block 14 and the guide rail slider 16 need to remain stationary at a certain position on the guide rail body 5, it is only necessary to tighten the position fixing screw 13. At this time, the guide rail clamping block 14 and the guide rail slider 16 can jointly clamp the protrusions on both sides, and under the action of a large friction force, the guide rail clamping block 14 and the guide rail slider 16 can be prevented from moving linearly along the guide rail body 5.

[0043] In this embodiment, the driving assembly includes two screw rods 19 and two slide rods 23. The outer wall of the screw rod 19 is provided with an external thread, and the slide rod 23 is a bare rod structure. The two screw rods 19 are respectively threadedly connected with a first direction driving slider 21 and a second direction driving slider 22, and the two slide rods 23 are respectively slidably connected with another first direction driving slider 21 and another second direction driving slider 22, and the screw rods 19 and the slide rods 23 corresponding to the first direction driving slider 21 are arranged parallel to each other, and the screw rods 19 and the slide rods 23 corresponding to the second direction driving slider 22 are arranged parallel to each other, and the screw rods 19 in the first direction driving slider 21 and the second direction driving slider 22 are perpendicular.

[0044] When the screw rod 19 connected to the first direction driving slider 21 rotates, the first direction driving slider 21 cannot rotate because the screw rod 19 is threadedly connected to the first direction driving slider 21, and the two form a common screw-nut pair structure, so that the first direction driving slider 21 connected to the screw rod 19 moves linearly along the axial direction of the screw rod 19. Because the first direction driving slider 21 is meshed with the external gear 17 through the first rack, when the first direction driving slider 21 moves linearly, the external gear 17 will rotate accordingly. The other side of the external gear 17 will mesh with another first direction driving slider 21 through the first rack, and the other first direction driving slider 21 will also move linearly along the axial direction of the slide rod 23 under the limiting effect of the slide rod 23 and the driving effect of the external gear 17.

[0045] Similarly, when the screw rod 19 connected to the second direction driving slider 22 rotates, the second direction driving slider 22 cannot rotate because the screw rod 19 is threadedly connected to the second direction driving slider 22, and the two form a common screw nut secondary structure, so that the second direction driving slider 22 connected to the screw rod 19 moves linearly along the axial direction of the screw rod 19. Because the second direction driving slider 22 is meshed with the internal gear 18 through the second rack, when the second direction driving slider 22 moves linearly, the internal gear 18 will rotate accordingly. The other side of the internal gear 18 will mesh with another second direction driving slider 22 through the second rack, and the other second direction driving slider 22 will also move linearly along the axial direction of the slide rod 23 under the limiting effect of the slide rod 23 and the driving effect of the internal gear 18.

[0046] In this embodiment, a manual adjustment block 20 is provided at one end of the screw 19, and a manual adjustment through hole is provided on the side wall of the support base 2. The manual adjustment block 20 passes through the manual adjustment through hole. The staff can rotate the manual adjustment block 20 manually or using other tools to realize the rotation of the screw 19.

[0047] During normal use, the staff first rotates the manual adjustment block 20 of the screw 19 in the first direction driving slider 21, so that one set of relative elbow clamping blocks 4 clamps the two sides of the elbow body 1, and then rotates the manual adjustment block 20 of the screw 19 in the second direction driving slider 22 to clamp the remaining two sides, thereby completing the technical effect of clamping the four sides of the elbow body 1.

[0048] In this embodiment, if Figure 3 As shown, the transmission assembly includes a passive slider 24, and the passive slider 24 is close to one side of the support cover (i.e. Figure 3 The upper end of the first direction driving slider 21 and the second direction driving slider 22 are away from the side of the support cover (i.e. Figure 3 An oblique groove is provided at the lower end of the housing, and the oblique protrusion is slidably connected to the corresponding oblique groove.

[0049] In addition, combined Figure 2 and Figure 3 As shown, four limiting slide grooves are provided on the side wall of the support base 2, and the cross-sectional shape of the limiting slide grooves is the same as the cross-sectional shape of the passive slider 24. The passive slider 24 is slidably connected in the limiting slide grooves, and the passive slider 24 can only make reciprocating linear movements along the limiting slide grooves, and the moving direction of the passive slider 24 is perpendicular to the moving direction of the corresponding first direction driving slider 21 or the second direction driving slider 22. Therefore, when the first direction driving slider 21 or the second direction driving slider 22 moves, due to the cooperation of the oblique grooves and the oblique protrusions and the limiting effect of the limiting slide grooves, the passive slider 24 makes a linear movement in a direction perpendicular to the corresponding first direction driving slider 21 or the second direction driving slider 22 under the driving force provided by the corresponding first direction driving slider 21 or the second direction driving slider 22.

[0050] In this embodiment, a mounting slot is provided on the side of the passive slider 24 away from the oblique protrusion, a clamping connection block 15 is fixed in the mounting slot, the clamping connection block 15 is fixedly connected with the elbow clamping block 4 by screws, and further, the clamping connection block 15 and the elbow clamping block 4 are fixed to the mounting slot by screws, so that the passive slider 24, the clamping connection block 15 and the elbow clamping block 4 are fixed as a whole and move synchronously. Therefore, when the passive slider 24 moves, it will drive the corresponding elbow clamping block 4 to move synchronously.

[0051] In this embodiment, due to the bidirectional clamping control method of four elbow clamping blocks 4, the cross-sectional shape of the elbow body 1 fixed by the elbow fixing device can be circular or elliptical, and can also be used to clamp elbow bodies 1 with different cross-sectional sizes.

[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pipe bending winding die, characterized in that: It includes a winding mold body, the winding mold body includes a supporting body, a central axis adjusting device and a bent pipe fixing device, and the central axis adjusting device and the bent pipe fixing device are respectively installed on both sides of the supporting body; The support body includes a support base and a support cover plate, and the support cover plate is fixed to one side of the support base; The central axis adjustment device comprises a central axis body, a guide rail body and an angle slide bar, wherein the guide rail body is fixed to the support cover plate, an articulated seat is fixed to one end of the guide rail body, and a guide rail slider is slidably connected to the other end of the guide rail body, one end of the angle slide bar is connected to the articulated seat, and the other end of the angle slide bar is hinged to the central axis body, and a guide rail clamping block is hinged to one end of the central axis body, and the guide rail clamping block is connected to the guide rail slider; The bent pipe fixing device includes two first direction driving sliders, two second direction driving sliders, an outer gear and an inner gear. The two first direction driving sliders are arranged opposite to each other, and the two second direction driving sliders are arranged opposite to each other. A first rack is provided on the side of the two first direction driving sliders close to the supporting cover plate, and the first rack is meshed with the outer gear. A second rack is provided on the side of the two second direction driving sliders away from the supporting cover plate, and the second rack is meshed with the inner gear. The first direction driving slider and the second direction driving slider are connected with a driving assembly, and the driving device is used to drive the first direction driving slider and the second direction driving slider to perform reciprocating linear movement. The first direction driving slider and the second direction driving slider are both connected to a bent pipe clamping block through a transmission assembly, and the four bent pipe clamping blocks are used to clamp one end of the bent pipe body.

2. The pipe bending winding die according to claim 1, characterized in that: The support base is a cylindrical structure, and the support cover is fixed to one end of the support base by screws.

3. The pipe bending winding die according to claim 1, characterized in that: A slide groove is provided in the angle slide bar, two hinge seats are provided, each hinge seat is provided with a hinge hole, and the slide groove is located between the two hinge holes; It also includes an angle adjustment bolt and an angle adjustment nut. The angle adjustment bolt passes through the hinge hole and the slide groove in sequence and is threadedly connected with the angle adjustment nut.

4. The pipe bending winding die according to claim 1, characterized in that: The central shaft body is provided with a plurality of positioning holes, and angle adjustment slip rings are installed at the positioning holes through positioning screws. One end of the angle slide rod away from the hinge seat is hinged to the angle adjustment slip ring through an angle adjustment pin.

5. The pipe bending winding die according to claim 1, characterized in that: The guide rail clamping block and the guide rail sliding block are fixedly connected via position fixing screws.

6. The pipe bending winding die according to claim 1, characterized in that: The driving assembly includes two screw rods and two sliding rods. The two screw rods are respectively threadedly connected to one first-direction driving slider and one second-direction driving slider, and the two sliding rods are respectively slidingly connected to another first-direction driving slider and another second-direction driving slider.

7. The pipe bending winding die according to claim 6, characterized in that: A manual adjustment block is provided at one end of the screw rod, a manual adjustment through hole is provided on the side wall of the support base, and the manual adjustment block passes through the manual adjustment through hole.

8. The pipe bending winding die according to claim 1, characterized in that: The transmission assembly comprises a passive slider, a side of the passive slider close to the support cover is provided with an oblique protrusion, and a side of the first direction driving slider and the second direction driving slider away from the support cover is provided with an oblique groove, and the oblique protrusion is slidably connected to the oblique groove; Four limiting sliding grooves are arranged on the side wall of the support base, and the passive sliding block is slidably connected in the limiting sliding grooves.

9. The pipe bending winding die according to claim 8, characterized in that: A mounting through groove is provided on a side of the passive sliding block away from the oblique protrusion, a clamping connection block is fixed in the mounting through groove, and the clamping connection block is fixedly connected to the elbow clamping block.

10. The pipe bending winding die according to claim 1, characterized in that: The cross-sectional shape of the curved pipe body is circular or elliptical.

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