A special-shaped spiral pipe disc pipe tooling

Abstract

The utility model discloses a kind of special-shaped spiral pipe coil tool, belong to metal tubular product plastic bending forming technical field.The tool includes coil jig assembly, pressing assembly and support assembly.Coil jig assembly includes coaxially fixed connection jig fixing piece and coil jig, for winding pipe material to form the spiral section of pipe material.Pressing assembly includes the rolling die structured in the outer circumferential surface of coil jig one side, and support assembly includes the roller structured in the outer circumferential surface of coil jig other side and opposite rolling die.Pipe material winding process, rolling die and roller form the clamping constraint to pipe material, limit the radial runout and axial movement of pipe material.Spiral groove for coil is provided on the outer circumferential surface of coil jig, and bevel slot is provided in the feed end of coil jig and communicates with the first end of spiral groove.The tool can solve the problem of space interference between pipe material special-shaped rotary bending end head and coil jig in pipe material winding process.

Description

Technical Field

[0001] This utility model belongs to the field of plastic bending and forming technology of metal pipes, specifically relating to a tooling for irregular spiral coils, which is mainly used in the segmented winding processing of irregular spiral coils with a turnout at one end in the fields of heat exchange equipment and pressure vessels. Background Technology

[0002] Spiral coils are one of the core components of heat exchange and pressure vessel equipment. Conventional equal diameter and equal pitch cylindrical spiral coils are usually wound using an integral closed cylindrical mold. The tube is continuously wound around the outer wall of the mold, and the mold ensures the accuracy of the coil diameter and pitch.

[0003] For irregularly shaped spiral tubes with a bend at one end, their inherent structure limits their ability to be integrally wound on a fully enclosed jig. The industry's conventional processing methods are mainly divided into two types: First, the central spiral main body is wound on the integral jig first, and then the bend at the end is formed by manual bending. Using this method, the bending force later pulls on the already formed spiral section, causing pitch deviation, out-of-roundness of the coil diameter, and poor overall coaxiality, resulting in a low product qualification rate and significant difficulty in secondary positioning and clamping. Second, the irregularly shaped bend at the end is prefabricated, and then the spiral main body is wound. Using this method, the prefabricated irregularly shaped bend will cause rigid spatial interference with the side wall of the fully enclosed jig, preventing the tube from properly adhering to the jig's outer wall for continuous winding, thus hindering normal processing.

[0004] In summary, existing integral coil jigs lack a structure to avoid irregular ends, cannot balance the precision of irregular end forming and spiral body winding, and lack dedicated winding fixtures suitable for single-end irregular spiral tubes. Utility Model Content

[0005] To address the shortcomings of existing integral coil jigs, which cannot avoid pre-fabricated irregular-shaped turn heads and cause interference between the irregular-shaped turn heads and the jig sidewalls during winding, a special irregular spiral tube coil jig is provided. After the turn heads are pre-fabricated manually at the ends, interference-free winding of the middle spiral section can be achieved, and the coil diameter, pitch and coaxiality can be precisely controlled to avoid forming and pulling deformation.

[0006] To solve the above-mentioned technical problems, this utility model provides a tooling for irregularly shaped spiral tube coils, and the specific technical solution adopted is as follows:

[0007] A special-shaped spiral coil tooling, comprising:

[0008] The coil jig assembly includes a jig fixing member 1 and a coil jig 2 that are coaxially fixedly connected, and is used to wind the tube to form a spiral segment of the tube;

[0009] The clamping assembly includes a rolling die 4 constructed on one side of the outer peripheral surface of the coil die 2; and

[0010] The support assembly includes a roller 6 constructed on the other side of the outer peripheral surface of the coil die 2 and opposite to the rolling die 4; during the tube winding process, the rolling die 4 and the roller 6 form a clamping constraint on the tube, limiting the radial runout and axial movement of the tube.

[0011] The coil jig 2 has a spiral groove 21 for coiling on its outer circumferential surface and an oblique groove 23 connected to the beginning of the spiral groove 21 at the feed end of the coil jig 2. During the coiling process, the oblique groove 23 is used to accommodate the irregular turning head at the end of the coil, so as to avoid spatial interference between the irregular turning head and the coil jig 2.

[0012] Preferably, the opening of the oblique groove 23 extends along the axial direction of the coil die 2 and smoothly connects with the spiral groove 21.

[0013] More preferably, the maximum depth of the oblique groove 23 is less than the pitch of the spiral groove 21.

[0014] Preferably, the rolling die 4 is provided with a rolling wheel; a limiting groove 40 is provided on the outer circumferential surface of the rolling wheel, and the downward groove of the limiting groove 40 and the upward groove of the corresponding spiral groove 21 form a passage for the tube to pass through during the winding process.

[0015] Preferably, the rolling die 4 includes rolling roller I 41 and rolling roller II 42; wherein, rolling roller I 41 is located downstream of the coil jig 2 in the rotation direction during the tube winding process, and rolling roller II 42 is located upstream in the rotation direction.

[0016] More preferably, the roller I 41 and roller II 42 are connected to the connecting end face of the clamping assembly via a connector with an adjustable installation distance.

[0017] More preferably, the distance difference ΔH between the plane containing the annular centerline of the limiting groove 40 of the rolling roller I 41 and the rolling roller II 42 and the connecting end face of the clamping assembly satisfies the following condition:

[0018]

[0019] Where d is the distance between the axes of roller I 41 and roller II 42; r is the distance between the axis of the coil jig 2 and the axis of the roller; and D is the pitch of the spiral groove 21.

[0020] Preferably, a cutter relief groove 22 is provided at the end of the spiral groove 21 of the coil die 2.

[0021] Preferably, the irregular spiral tube coiling tooling also includes a power mechanism. The coiling fixture assembly is fixedly connected to the power mechanism through the fixture fixing part 1. During the tube winding process, the power mechanism drives the coiling fixture assembly to rotate.

[0022] Preferably, the irregular spiral tube coiling tooling further includes a feeding mechanism, which is connected to the coiling die assembly or to a combination of the clamping assembly and the support assembly. During the tube winding process, the coiling die assembly and the combination of the clamping assembly and the support assembly move relative to each other. The direction of the relative movement is that the combination of the clamping assembly and the support assembly moves from the feed end of the coiling die 2 to the non-feed end, so that the subsequent tube can be smoothly wound on the spiral groove 21 of the coiling die 2.

[0023] Preferably, the body of the coiled tire 2 is a cylindrical tire body.

[0024] Preferably, the clamping assembly includes a clamping seat 3, a rolling die 4, and a pin I 5; wherein the rolling die 4 includes two rolling rollers, namely rolling roller I 41 and rolling roller II 42. Rolling roller I 41 and rolling roller II 42 are rotatably mounted on the side of the clamping seat 3 via pin I 5.

[0025] More preferably, the main body of the clamping seat 3 is an L-shaped structure integrally formed by the vertical connecting part 31 and the horizontal connecting part 32; a rolling roller connecting part is provided at both ends of the bottom surface of the horizontal connecting part 32 for connecting the rolling roller.

[0026] Preferably, the support assembly includes rollers 6, support base 7, and pin II 8, wherein two rollers 6 are installed in the U-shaped groove with the groove opening facing upward in the support base 7, and are rotatably connected to the support base 7 by pin II 8.

[0027] Compared with the prior art, the beneficial effects obtained by this utility model are as follows:

[0028] I. This disclosed tooling eliminates the problem of spatial interference between the irregularly shaped bend at the end of the tube and the coiling fixture during the tube winding process. Specifically, this disclosure provides a beveled groove at the feed end of the coiling fixture, which completely accommodates the pre-formed irregularly shaped bend of the tube within the groove. During the tube winding process, the irregularly shaped bend of the tube has no physical contact with the coiling fixture, thus completely resolving the spatial interference problem between the two.

[0029] II. The tooling disclosed herein helps to ensure the forming accuracy of the pipe and improve the product qualification rate. The irregular-shaped bend of the pipe can be bent and formed independently in advance, without the need for secondary bending after the spiral section is wound. This avoids the pulling force of bending on the already formed spiral section. The spiral groove provides radial limit for the pipe throughout the entire process, which can accurately ensure the coil diameter, pitch and coaxiality of the coil, and greatly improve the product qualification rate.

[0030] Third, the tooling disclosed herein has strong versatility and helps improve processing efficiency. The tooling is convenient for clamping, workpiece positioning, and unloading operations, and can be directly adapted to conventional coil winding equipment. Furthermore, by changing the coil jigs with different groove diameters and thread pitches, it can be adapted to different specifications of pipes, making it widely applicable.

[0031] Fourth, the fixture disclosed herein has a relief groove at the end of the spiral groove, which can eliminate the dead angle at the end of the spiral groove machining, facilitate the entry and exit of the machining tool, thereby reducing the machining difficulty and manufacturing cost of the fixture itself.

[0032] 5. The tooling disclosed herein has a clamping component at the upper part of the coil jig assembly and a supporting component at the lower part. The clamping component and the supporting component form a clamping constraint on the jig and the tube during processing, which can effectively suppress the radial runout and axial movement of the tube during the winding process and ensure the stability of the tube forming.

[0033] VI. The clamping assembly in this disclosed tooling is equipped with two rolling rollers opposite to the spiral grooves of their lower fixtures. Each rolling roller has a corresponding limiting groove, forming a complete circular constraint structure that effectively constrains the pipe passing through it during winding. Simultaneously, during the arrangement of the rolling rollers, to avoid simply fitting the rolling rollers to the side of the clamping seat and ignoring the difference in axial pitch of the fixture caused by the installation distance between the two rolling rollers, which could lead to misalignment between the spiral grooves and the limiting grooves, the distance between the rolling rollers and the mounting sides of the clamping seat is adjusted using threaded pins or pins. This ensures that the limiting grooves on both the front and rear rolling rollers are precisely aligned with the spiral grooves below them, preventing pipe deformation during winding due to misalignment. Attached Figure Description

[0034] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0035] Figure 1 A perspective view of a non-circular spiral tube coil tooling according to a preferred embodiment of the present invention is shown schematically.

[0036] Figure 2 The diagram schematically shows a rear view of a non-circular spiral tube coil tooling according to a preferred embodiment of the present invention.

[0037] Figure 3 A perspective view of a coiled jig assembly in a preferred embodiment of the present invention is shown schematically.

[0038] Figure 4 for Figure 3 The front view.

[0039] Figure 5 A perspective view of the clamping assembly in a preferred embodiment of the present invention is shown schematically.

[0040] Figure 6 A perspective view of the support component in a preferred embodiment of the present invention is shown schematically.

[0041] Figure 7 The diagram schematically shows a right view of a non-circular spiral tube coil tooling according to a preferred embodiment of the present invention.

[0042] The reference numerals used in the above figures are as follows:

[0043] 1. Fixture fixing component; 2. Coil fixture; 3. Clamping seat; 4. Rolling die; 5. Pin I; 6. Roller; 7. Support seat; 8. Pin II;

[0044] 11. Center positioning hole; 12. Fixing hole;

[0045] 21. Spiral groove; 22. Relief groove; 23. Beveled groove;

[0046] 31. Vertical connecting part; 32. Horizontal connecting part;

[0047] 40, limiting groove; 41, rolling roller I; 42, rolling roller II;

[0048] 71, U-shaped groove; 72, support leg; 73, base plate;

[0049] d, the distance between the axis of roller I and the axis of roller II; r, the distance between the axis of the fixture and the axis of the roller; α, the angle between the center of the fixture and the line connecting the centers of the two rollers. Detailed Implementation

[0050] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented by various different embodiments as defined and covered by the claims.

[0051] In the following description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and "vertical" 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 utility model 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 limitations on this utility model.

[0052] In the following description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Furthermore, in the following description of this utility model, unless otherwise stated, "multiple", "multiple groups", or "multiple roots" means two or more.

[0054] In the following embodiments, the rolling roller and roller 6 are rotatably connected to adjacent components by means of components such as pins. Those skilled in the art can use existing conventional technical means to achieve the above-mentioned rotatable connection, including but not limited to installing rotary bearings when necessary.

[0055] In the following embodiments, the axes of the five cylindrical structures—the coil jig 2, the two rolling rollers, and the two rollers—are parallel to each other.

[0056] In some embodiments, such as Figure 1 As shown, the coil fixture is divided into three parts from top to bottom: a clamping assembly, a coil jig assembly, and a support assembly. The clamping assembly mainly consists of an L-shaped, integrally formed clamping seat 3, a rolling die 4 including two rolling rollers, and a pin I 5 connecting the rolling die 4 and the clamping seat 3. The outer circumferential surface of the rolling die 4 is tangent to the outer circumferential surface of the coil jig 2 at its bottom.

[0057] The coil jig assembly mainly consists of two parts: jig fixing component 1 and coil jig 2. Jig fixing component 1 is a flange used for fixed connection with the rotary power mechanism, thereby driving the coil jig 2 to rotate. The coil jig 2 is a cylindrical jig body with spiral grooves on its outer circumference. The support assembly at the bottom mainly consists of three parts: two rollers 6, two pins II 8, and a support base 7. The rollers 6 are disposed within the U-shaped grooves of the support base 7 and are rotatably connected to the support base 7 via pins II 8.

[0058] In some embodiments, such as Figure 1 , Figure 2 and Figure 5As shown, the clamping seat 3 has a vertical connecting part 31, and a horizontal connecting part 32 at the bottom of the vertical connecting part 31. The rolling rollers I 41 and II 42 of the rolling die 4 are connected to the same side of the horizontal connecting part 32, and each rolling roller has an annular limiting groove 40. The limiting groove 40 is opposite to the spiral groove 21 on the coil jig 2 at its bottom, forming a complete circular passage to suppress radial runout and axial movement of the pipe. Since the two rolling rollers are located at different positions when the coil jig 2 rotates, there is an upstream and downstream division in the rotation direction, and the spiral grooves 21 corresponding to the limiting grooves 40 of the two rolling rollers are not on the same radial section. Therefore, the rolling rollers I 41 and II 42 need to be installed according to specific positions. If the two rolling rollers are of the same thickness, the pipe is fed from above the bottom roller 6 between the pipe and the coil jig 2. At the start of winding, the pipe first passes through rolling roller II 42, then through rolling roller I 41, meaning rolling roller II 42 is in the upstream position and rolling roller I 41 is in the downstream position. During installation, it will appear as follows: Figure 2 As shown, when the downstream rolling roller I41 is in contact with the side of the transverse connecting part 32, the upstream rolling roller II 42 has a certain gap with the side of the transverse connecting part 32.

[0059] In addition, from Figure 2 As can be seen, a relief groove 22 is also provided at the end of the spiral groove 21 to facilitate the manufacturing of the fixture.

[0060] In some embodiments, such as Figure 3 and Figure 4 As shown, the coil jig 2 is a cylindrical jig body with a partially covered spiral groove 21 on its outer circumference. The jig fixing member 1 is fixedly installed on the side not covered by the spiral groove 21 and is coaxially fixed with the coil jig 2. The end that fully covers the spiral groove 21 is the tube feed end during winding. A beveled groove 23 is provided at the end of this feed end to accommodate irregularly shaped bends and prevents spatial interference between the tube and the coil jig 2.

[0061] A large-diameter central positioning hole 11 is provided at the center of the fixture fixing component 1 for coaxial fixation with the rotary power output shaft of the coiling machine. Four fixing holes 12 are provided in a circumferentially distributed manner on the outer side of the central positioning hole 11 to facilitate fixed connection with the rotary worktable of the coiling machine.

[0062] In some embodiments, such as Figure 5As shown, the clamping assembly consists of an L-shaped clamping seat 3, rolling rollers I 41 and II 42, and two pins I 5. The clamping seat 3 includes a vertical connecting part 31 and a horizontal connecting part 32. The vertical connecting part 31 is used to connect to the coiling machine workbench or other supporting structures such as brackets. The bottom ends of the horizontal connecting part 32 each have a rolling roller connecting part with through holes for the pins I 5 to pass through the rolling rollers. To adjust the distance between the rolling rollers and the rolling roller connecting parts, the pins I 5 can be connected by an external thread that engages with the internal thread in the through hole of the rolling roller connecting part. Alternatively, other known methods for adjusting the distance between the rolling rollers and the connecting parts can also be used.

[0063] In some embodiments, such as Figure 6 As shown, the support assembly consists of two rollers 6, two pins II 8, and a support base 7. The two rollers 6 are rotatably connected to the U-shaped channels of the support base 7 via the two pins II 8. The support base 7 includes a base plate 73, three support legs 72, and the aforementioned U-shaped channel 71 for accommodating the rollers 6. The three support legs 72 are linearly arranged and evenly supported at the bottom of the U-shaped channel 71, and are fixedly connected to the base plate 73. The rollers 6 can rotate freely around the pins II 8 to reduce axial friction during pipe feeding, ensuring smooth pipe supply.

[0064] When multiple rollers are used in the clamping assembly, different rollers will inevitably be positioned upstream or downstream of the coil jig 2 in the direction of rotation. This will result in a certain deviation in the axial position between the limiting grooves of different rollers and the helical grooves that need to be matched. If all rollers are uniformly and fixed to the side of the roller connection part of the clamping seat 3, at most only one roller's limiting groove can be accurately matched with the helical groove; the other rollers will be misaligned. These misalignments may cause extrusion deformation of the pipe during the winding process. Therefore, when multiple rollers are used, the installation position of each roller needs to be accurately adjusted.

[0065] In some embodiments, such as Figure 7As shown, after the two rolling rollers of the rolling die 4 are installed, their outer peripheral surfaces are tangent to the outer peripheral surface of the coil jig 2, thus ensuring the connection between the former's limiting groove and the latter's spiral groove. Since the mounting positions of the two rolling rollers of the clamping seat 3 are fixed, the distance d between the axes of the two rolling rollers is a fixed value. Therefore, the distance r from the axis of the coil jig 2 to the axes of the two rolling rollers is the same, and this distance will only change due to the use of coil jigs 2 with different outer diameters (or rolling rollers with different outer diameters). Similarly, when a coil jig 2 of a certain specification is used, the pitch D of its spiral groove 21 is also fixed. When the rolling roller II 42 is in the upstream position and the rolling roller I 41 is in the downstream position, the pipe passes through the rolling roller II 42 and turns by an angle α before passing through the rolling roller I 41. Since the spiral groove 21 is distributed along a spiral line on the outer peripheral surface of the coil jig 2, after the coil jig 2 turns by an angle α, the spiral groove 21 actually travels a certain distance axially. Therefore, there will be a certain axial misalignment between the installation positions of different rolling rollers, that is, the distance difference ΔH between the planes containing the annular center lines of the rolling roller limit grooves should meet the requirements of the following formula after calculation:

[0066]

[0067] Example 1

[0068] This embodiment provides a coiling tool for winding a ø10mm stainless steel seamless pipe with an irregular bend end.

[0069] In this embodiment of the coil tooling, the coil fixture assembly mainly consists of a fixture fixing component 1 and a coil fixture 2. The fixture fixing component 1 is a circular flange, and the coil fixture 2 is a vertical hollow cylindrical fixture body. The coil fixture 2 and the fixture fixing component 1 are coaxially fixedly connected. The fixed connection can be achieved by welding or other existing detachable fixed connections that can ensure rotational stability; this is not limited here.

[0070] A spiral groove 21 with a pitch D of 48 mm and a groove diameter of ø10.1 mm is provided on the outer circumferential surface of the coil jig 2 to facilitate the bending operation of ø10.0 mm stainless steel seamless pipes. An oblique groove 23 with an axial depth of 29 mm is provided at the feed end of the coil jig 2. The groove extends downward along the axial direction of the coil jig 2 body and smoothly connects with the spiral groove 21, thus forming a space at the feed end that can accommodate irregularly shaped bendable ends. This space can accommodate pre-bent irregularly shaped bendable ends, fundamentally eliminating spatial interference between them by preventing contact between the irregularly shaped bendable ends and the coil jig 2 body. Simultaneously, a tool relief groove 22 with an axial depth of 10 mm is provided at the end of the spiral groove 21, allowing the tool tip to avoid the coil jig 2 during manufacturing, thereby eliminating machining dead angles, improving yield, and reducing the manufacturing cost of the coil jig 2.

[0071] The flange, which serves as the fixture fixing component 1, has a ø30mm center positioning hole 11 at its center for coaxial positioning with the central shaft of the coiling machine, which serves as the power mechanism. Simultaneously, four M12 threaded holes, ø180mm as the pitch circle and centered on the center positioning hole 11, are evenly distributed on the flange as fixing holes 12. These holes are used to lock and fix the fixture fixing component 1 and the coiling fixture 2 assembly onto the rotating worktable of the coiling machine, ensuring that the axial direction of the coiling fixture 2 is strictly coaxial with the rotation axis of the coiling machine.

[0072] The support assembly mainly consists of a support base 7, two rollers 6, and two pins II 8. The support base 7 includes a base plate 73, three cylindrical support legs 72, and a U-shaped groove 71. Two through holes are provided on each side of the U-shaped groove 71, and the two pins II 8 pass through these holes to connect with the two rollers 6 located within the U-shaped groove 71. This allows the rollers 6 to rotate freely around the pins II 8, providing bottom support for the pipe during feeding and reducing frictional resistance during axial pipe feeding, ensuring smooth feeding during pipe winding. The bottom of the three support legs 72 is fixedly connected to the base plate 73, and the top is fixedly connected to the bottom of the U-shaped groove 71, thus providing stable support for the U-shaped groove 71.

[0073] The clamping assembly mainly consists of an L-shaped clamping seat 3, two rolling rollers (rolling roller I 41 and rolling roller II 42) serving as rolling molds 4, and two pins I 5 for mounting the rolling rollers. The clamping seat 3 is a one-piece molded structure, with a vertical connecting part 31 and a horizontal connecting part 32 as its main body. At each end of the lower part of the horizontal connecting part 32, there is a rolling roller mounting part, which has a through hole for the pins I 5 to pass through. To adjust the distance between the rolling rollers and the mounting sides of the rolling roller mounting parts, internal threads can be provided in the through holes, and external threads can be provided in the pins I 5, allowing for precise control of the mounting position of the two rolling rollers through a threaded connection.

[0074] An annular limiting groove 40 is provided on the rolling roller, and the specifications of the limiting groove 40 match the spiral groove 21, thereby forming a circular passage for the tube to pass through above the coil jig 2. Overall, the clamping component located above the coil jig 2 and the supporting component located below form a clamping constraint on the tube, thereby suppressing the radial runout and axial movement of the tube during the coil winding process, ensuring the stability and accuracy of the forming.

[0075] During operation, the pre-formed irregular-shaped bend end is first inserted into the inclined groove 23 of the coiling die 2. This bend end does not make physical contact with the body of the coiling die 2 after entering the groove 23, thus preventing spatial interference during winding. After starting the coiling machine, it drives the coiling die 2 to rotate. The pipe behind the bend end enters the spiral groove 21 of the coiling die 2. As the coiling die 2 rotates continuously, it winds along the spiral groove 21 onto the outer circumference of the coiling die 2, forming a spiral segment of the pipe. During the winding process, the entire coiling die assembly is fed towards the feed end by the coiling machine, ensuring that the pipe at the rear end is continuously wound within the spiral groove 21. The roller 6 located at the bottom of the coiling die 2 rotates continuously to ensure smooth pipe feeding. The limiting groove 40 of the rolling roller of the pressing assembly located on the upper part of the coil jig 2 is arranged opposite to the spiral groove 21 to form a passage for the tube to pass through, and together with the roller 6, it suppresses the radial runout and axial movement of the tube during the winding process to ensure the stability of the tube forming.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tooling for an irregularly shaped spiral tube coil, characterized in that, include: The coil jig assembly includes a jig fixing member (1) and a coil jig (2) that are coaxially fixedly connected, for winding tubing to form a spiral segment of the tubing; The clamping assembly includes a rolling die (4) constructed on one side of the outer peripheral surface of the coil die (2); and The support assembly includes a roller (6) constructed on the other side of the outer peripheral surface of the coil die (2) and opposite to the rolling die (4); during the coil winding process, the rolling die (4) and the roller (6) form a clamping constraint on the coil, limiting the radial runout and axial movement of the coil. Among them, a spiral groove (21) for coiling is provided on the outer circumferential surface of the coil jig (2), and an oblique groove (23) connected to the head end of the spiral groove (21) is provided at the feed end of the coil jig (2); during the coiling process, the oblique groove (23) is used to accommodate the irregular turning head at the end of the coil, so as to avoid spatial interference between the irregular turning head and the coil jig (2).

2. The irregular spiral tube coil tooling according to claim 1, characterized in that, The opening of the oblique groove (23) extends along the axial direction of the coil jig (2) and smoothly connects with the spiral groove (21).

3. The irregular spiral tube coil tooling according to claim 2, characterized in that, The maximum depth of the oblique groove (23) is less than the pitch of the spiral groove (21).

4. The irregular spiral tube coil tooling according to claim 1, characterized in that, The rolling die (4) is equipped with a rolling wheel; a limiting groove (40) is provided on the outer circumferential surface of the rolling wheel. The downward groove of the limiting groove (40) and the upward groove of the corresponding spiral groove (21) form a passage for the tube to pass through during the winding process.

5. The irregular spiral tube coil tooling according to claim 4, characterized in that, The rolling die (4) includes rolling roller I (41) and rolling roller II (42); wherein, rolling roller I (41) is located downstream of the coil jig (2) in the rotation direction during the pipe winding process, and rolling roller II (42) is located upstream in the rotation direction.

6. The irregular spiral tube coil tooling according to claim 5, characterized in that, Roller I (41) and roller II (42) are connected to the connection end face of the clamping assembly via an adjustable installation distance connector.

7. The irregular spiral tube coil tooling according to claim 6, characterized in that, The distance difference ΔH between the plane containing the annular centerline of the limiting groove (40) of roller I (41) and roller II (42) and the connecting end face of the clamping assembly satisfies the following condition: Where d is the distance between the axes of roller I (41) and roller II (42); r is the distance from the axis of the coil jig (2) to the axis of the roller; and D is the pitch of the spiral groove (21).

8. The irregular spiral tube coil tooling according to claim 1, characterized in that, A cutter relief groove (22) is provided at the end of the spiral groove (21) of the coil die (2).

9. The irregular spiral tube coil tooling according to claim 1, characterized in that, It also includes a power mechanism. The coil jig assembly is fixedly connected to the power mechanism through the jig fixing part (1). During the coil winding process, the power mechanism drives the coil jig assembly to rotate.

10. The irregular spiral tube coil tooling according to claim 1, characterized in that, It also includes a feeding mechanism, which is connected to the coil jig assembly or to a combination of the clamping assembly and the support assembly; during the tube winding process, the coil jig assembly and the combination of the clamping assembly and the support assembly move relative to each other; The relative movement direction is that the combination of the pressing component and the support component moves from the feed end of the coil jig (2) to the non-feed end.

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