Taper forming die

Abstract

The utility model belongs to metal piece forming technical field discloses taper forming die. Be used for the taper forming of metal pipe spare, this taper forming die includes die body and taper sleeve mould, die body is set up with the sliding cavity of limit cavity and intercommunication, metal pipe spare is contained in limit cavity and sliding cavity, and metal pipe spare is limited in limit cavity, taper sleeve mould can be along the direction of close or far away limit cavity sliding setting in sliding cavity under the driving of external member, taper sleeve mould is set up with taper hole, the inner wall of taper hole is used for extruding metal pipe spare, this kind of taper forming die can first limit metal pipe spare, ensure the position stability in the metal pipe spare forming process, secondly, taper forming die forms taper on metal pipe spare through the mode of extrusion, can reduce the problem that high strength metal pipe spare taper forming is easy to crack, and then improves the yield, and the forming efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of metal part forming technology, and in particular to a tapered forming mold. Background Technology

[0002] With the growing popularity of cycling and the increasing variety of cycling environments, cyclists are demanding more specialized bicycles made of different materials. Titanium alloy frames offer excellent elasticity and shock absorption, effectively absorbing road vibrations and impacts, reducing the feeling of bumps during riding. They strike a perfect balance between comfort and performance on roads, mountain bikes, and gravel surfaces, providing a more comfortable riding experience. Furthermore, titanium alloys are corrosion-resistant and resistant to extreme temperatures, making their fatigue strength five times higher than that of ordinary aluminum alloy frames. This prevents metal fatigue due to stress, resulting in higher strength and a longer lifespan for the bicycle. Therefore, more and more cyclists are choosing bicycles with titanium alloy frames.

[0003] To meet these demands, more and more manufacturers are focusing on manufacturing titanium alloy frames. However, due to the unique characteristics of titanium alloy tubing, such as high strength, high hardness, low plasticity, high elastic modulus, and high temperature sensitivity, these properties make it exceptionally difficult to process. Especially in bicycle design, due to the difference in outer diameter between the head tube and seat tube, titanium alloy tubing is usually tapered, with a larger front and smaller rear. When aluminum alloy tubing is used, it is often processed using a slanting machine. However, due to the high strength and high hardness of titanium alloy tubing, cracking usually occurs during slanting, resulting in a low yield rate, which not only increases costs but also affects production efficiency.

[0004] Therefore, a method for forming tapered metal pipe fittings and a tapered forming mold are needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a tapered forming mold that processes the tapered shape of metal pipes by extrusion. This avoids the problem of cracking that easily occurs when the metal pipes are processed by a slanting machine, thereby improving the yield rate of tapered metal pipe forming and having better processing efficiency and product consistency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A tapered forming die for forming tapered metal pipe fittings, the tapered forming die comprising:

[0008] The mold body has a limiting cavity and a sliding cavity that are interconnected. The metal tube is accommodated in the limiting cavity and the sliding cavity, and the metal tube is limited in the limiting cavity.

[0009] A tapered die is slidably disposed in the sliding cavity along a direction close to or away from the limiting cavity under the action of an external driving component. The tapered die has a tapered hole, which is coaxially arranged with the limiting cavity. The inner wall of the tapered hole is used to extrude the metal tube.

[0010] As an optional technical solution, the tapered die includes a first tapered die and a second tapered die, which are detachably connected. The first tapered die has a tapered hole, and the second tapered die has a through hole. The through hole and the tapered hole are coaxially arranged, and the through hole is used for the metal pipe to pass through.

[0011] As an optional technical solution, the mold body includes an upper mold and a lower mold, the upper mold and the lower mold are movably connected, the upper mold is provided with an upper semi-circular arc, the lower mold is provided with a lower semi-circular arc, and the upper semi-circular arc and the lower semi-circular arc are interlocked to form the limiting cavity.

[0012] As an optional technical solution, the upper mold is provided with an upper groove, which is connected to the upper semicircular arc through an upper abutting surface; the lower mold is provided with a lower groove, which is connected to the lower semicircular arc through a lower abutting surface; the upper groove and the lower groove form the sliding cavity; the upper abutting surface and the lower abutting surface form an abutting surface; and the sliding cavity and the limiting cavity are connected through the abutting surface.

[0013] As an optional technical solution, the tapered forming mold further includes a fixing structure, which includes a fixing seat and a fixing column. The fixing seat is disposed on the mold body and located on the side of the limiting cavity away from the sliding cavity. The fixing column is connected to the fixing seat, and at least part of the fixing column is located in the limiting cavity.

[0014] As an optional technical solution, the fixing base includes a body and an abutment plate, the abutment plate is connected to the body, and the abutment plate is used to abut against the mold body; the body is provided with a connecting hole, and the fixing column is provided with a connecting threaded hole along its own axial direction, and the connecting bolt passes through the connecting hole and is threadedly connected to the connecting threaded hole to detachably connect the fixing column and the body.

[0015] As an optional technical solution, the tapered forming mold further includes a limiting structure, which includes a limiting groove and a limiting protrusion. The limiting groove is disposed on the fixed post and extends to the end face of the fixed post near the tapered mold sleeve. The limiting protrusion is disposed in the sliding cavity. The limiting protrusion and the limiting groove are spaced apart. The limiting protrusion is used to abut against the metal pipe.

[0016] As an optional technical solution, the tapered forming mold further includes a limiting block, which is disposed in the sliding cavity and can abut against the tapered sleeve mold.

[0017] As an optional technical solution, the tapered forming mold further includes a connecting assembly, which includes a connecting seat and a support rod. The support rod is supported and connected between the connecting seat and the tapered die, and the connecting seat is used to connect an external driving component.

[0018] As an optional technical solution, multiple support rods are provided, and the multiple support rods are evenly distributed around the tapered hole in the circumference, and the axial direction of the support rods is parallel to the axial direction of the tapered hole.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a tapered forming mold for tapering metal pipe fittings. The tapered forming mold includes a mold body and a tapered sleeve mold. The mold body has a limiting cavity and a sliding cavity that are interconnected. The metal pipe fitting is accommodated in the limiting cavity and the sliding cavity, and the metal pipe fitting is confined in the limiting cavity. The tapered sleeve mold can slide in the sliding cavity along the direction close to or away from the limiting cavity under the drive of an external driving component. The tapered sleeve mold has a tapered hole, which is coaxially arranged with the limiting cavity. The inner wall of the tapered hole is used to extrude the metal pipe fitting. Before tapering, an external drive unit moves the tapered die away from the limiting cavity. Then, the operator places the metal pipe into the limiting cavity and positions it. As the external drive unit moves the tapered die closer to the limiting cavity, the tapered hole of the tapered die compresses the metal pipe, thus forming a tapered shape. This tapered die first limits the position of the metal pipe, ensuring its stability during the forming process. Secondly, the tapered die forms a tapered shape on the metal pipe through extrusion, reducing the problem of cracking during tapered forming of high-strength metal pipes, thereby improving the yield rate and increasing the forming efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the tapered forming mold according to an embodiment of the present invention;

[0022] Figure 2This is a cross-sectional view of the tapered forming mold according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 A magnified view of part A in the image;

[0024] Figure 4 This is a structural schematic diagram of the tapered forming mold (upper mold hidden) according to an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional view of the mold body according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the tapered die and connecting assembly according to an embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional view of the tapered die and connecting assembly according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the fixed structure according to an embodiment of the present invention.

[0029] In the picture:

[0030] 1. Taper forming mold; 2. Metal pipe fittings;

[0031] 10. Mold body; 11. Limiting cavity; 12. Sliding cavity; 13. Upper mold; 131. Upper semicircular arc; 132. Upper groove; 14. Lower mold; 141. Lower semicircular arc; 142. Lower groove;

[0032] 20. Tapered die; 21. First tapered die; 211. Tapered hole; 22. Second tapered die; 221. Through hole;

[0033] 30. Fixed structure; 31. Fixed base; 311. Body; 312. Abutment plate; 32. Fixed column;

[0034] 41. Limiting groove; 42. Limiting protrusion;

[0035] 50. Connecting component; 51. Connecting seat; 52. Support rod. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] like Figures 1 to 8 As shown, this embodiment provides a tapered forming mold 1 for tapering a metal tube 2. The tapered forming mold 1 includes a mold body 10 and a tapered sleeve mold 20. The mold body 10 has a limiting cavity 11 and a sliding cavity 12 that are interconnected. The metal tube 2 is accommodated in the limiting cavity 11 and the sliding cavity 12, and the metal tube 2 is limited in the limiting cavity 11. The tapered sleeve mold 20 can be slidably disposed in the sliding cavity 12 along the direction close to or away from the limiting cavity 11 under the drive of an external driving component. The tapered sleeve mold 20 has a tapered hole 211, which is coaxially arranged with the limiting cavity 11. The inner wall of the tapered hole 211 is used to extrude the metal tube 2.

[0041] Specifically, in this embodiment, the limiting cavity 11 can limit the metal pipe 2, thereby improving the positional stability during the tapered forming process, and thus improving the forming efficiency and dimensional accuracy of the metal pipe 2. Before tapered forming, the external driving component drives the tapered mold 20 away from the limiting cavity 11. Then, the operator can place the metal pipe 2 in the limiting cavity 11 and limit it. During the process of the external driving component driving the tapered mold 20 closer to the limiting cavity 11, the tapered hole 211 of the tapered mold 20 can squeeze the metal pipe 2, thereby forming a tapered shape on the metal pipe 2. This tapered forming mold 1 can first limit the metal pipe 2 to ensure the positional stability of the metal pipe 2 during the forming process. Secondly, the tapered forming mold 1 forms a tapered shape on the metal pipe 2 by extrusion. Compared with the existing technology of using a slanting machine, it can reduce the problem of easy cracking of high-strength metal pipe 2 during tapered forming, thereby improving the yield and forming efficiency.

[0042] Furthermore, such as Figure 2 , Figure 6 and Figure 7 As shown, the tapered die 20 includes a first tapered die 21 and a second tapered die 22, which are detachably connected. The first tapered die 21 has a tapered hole 211, and the second tapered die 22 has a through hole 221. The through hole 221 and the tapered hole 211 are coaxially arranged, and the through hole 221 is used for the passage of the metal pipe 2. Specifically, in this embodiment, the first tapered die 21 and the second tapered die 22 are detachably connected by bolts. The tapered hole 211 of the first tapered die 21 is used to extrude the metal pipe 2, and the through hole 221 of the second tapered die 22 is used for the passage of the extruded metal pipe 2. This arrangement can ensure that the middle part of the metal pipe 2 is properly formed into a tapered shape, thereby improving the versatility of the tapered forming die 1.

[0043] Furthermore, such as Figure 5 As shown, the mold body 10 includes an upper mold 13 and a lower mold 14, which are movably connected. The upper mold 13 is provided with an upper semicircular arc 131, and the lower mold 14 is provided with a lower semicircular arc 141. The upper semicircular arc 131 and the lower semicircular arc 141 are interlocked to form a limiting cavity 11. Specifically, in this embodiment, the upper semicircular arc 131 and the lower semicircular arc 141 form a limiting cavity 11 with a circular cross-section. The limiting cavity 11 with a circular cross-section can be adapted to the shape of the metal tube 2, which can facilitate the centering of the metal tube 2 and thus improve the forming effect of the metal tube 2. Moreover, the limiting cavity 11 with a circular cross-section can limit the deformation of the metal tube 2 during forming, thereby ensuring that the shape of the subsequent workpiece meets the usage requirements.

[0044] Furthermore, such as Figure 5As shown, the upper mold 13 has an upper groove 132 connected to the upper semicircular arc 131 via an upper abutment surface. The lower mold 14 has a lower groove 142 connected to the lower semicircular arc 141 via a lower abutment surface. The upper groove 132 and the lower groove 142 form a sliding cavity 12, and the upper abutment surface and the lower abutment surface form an abutment surface. The sliding cavity 12 and the limiting cavity 11 are connected via the abutment surface. Specifically, in this embodiment, the upper groove 132 and the lower groove 142 form a sliding cavity 12 with a rectangular cross-section, which can improve the support and guiding effect on the tapered mold 20, thereby improving the stability of the tapered mold 20 during movement and ensuring the forming effect of the metal pipe 2. The abutment surface can limit the tapered mold 20.

[0045] Specifically, in this embodiment, the lower mold 14 is fixedly installed above the machine base, and a lifting mechanism is provided on the top of the machine base. The lifting mechanism is fixedly connected to the upper mold 13, which can drive the upper mold 13 to move in the direction of approaching or moving away from the lower mold 14, thereby realizing the opening and closing of the mold body 10. A side-push pressure cylinder is provided on the side of the machine base. The telescopic rod of the side-push pressure cylinder is connected to the tapered mold sleeve 20. When the telescopic rod extends and retracts, it can drive the tapered mold sleeve 20 to move in the direction of approaching or moving away from the limiting cavity 11, thereby enabling the metal pipe 2 to be tapered and to be demolded normally after forming, ensuring that the metal pipe 2 can be taken out normally after forming.

[0046] Furthermore, such as Figure 2 As shown, the tapered forming mold 1 also includes a fixing structure 30, which includes a fixing seat 31 and a fixing post 32. The fixing seat 31 is disposed on the mold body 10 and located on the side of the limiting cavity 11 away from the sliding cavity 12. The fixing post 32 is connected to the fixing seat 31, and at least part of the fixing post 32 is located in the limiting cavity 11. Specifically, in this embodiment, the fixing seat 31 of the fixing structure 30 is fixedly connected to the lower mold 14. The fixing post 32 is cylindrical and is coaxially arranged with the limiting cavity 11. When the metal tube 2 is limited to the limiting cavity 11, the metal tube 2 is sleeved on the outer periphery of the fixing post 32. This ensures that the deformation of the metal tube 2 is within a controllable range and that the metal tube 2 has a good centering effect when sleeved on the fixing post 32, thereby ensuring the forming effect of the metal tube 2.

[0047] Furthermore, such as Figure 8As shown, the fixing base 31 includes a body 311 and an abutment plate 312. The abutment plate 312 is connected to the body 311 and abuts against the mold body 10. The body 311 is provided with a connecting hole, and the fixing column 32 is provided with a connecting threaded hole along its own axial direction. The connecting bolt passes through the connecting hole and is threaded into the connecting threaded hole to detachably connect the fixing column 32 and the body 311. Specifically, in this embodiment, the abutment plate 312 abuts against the lower mold 14. The setting of the abutment plate 312 makes the upper mold 13 and the body 311 spaced apart, which can avoid mutual interference between the upper mold 13 and the body 311 during the lifting and lowering process, thereby effectively reducing noise during operation and improving the comfort of the working environment. The fixing column 32 and the body 311 are connected by connecting bolts, which can facilitate replacement after the fixing column 32 is damaged, thereby reducing the cost of raw materials.

[0048] Specifically, in this embodiment, the main body 311 and the abutment plate 312 are respectively provided with a first through hole and a second through hole, which are connected. The lower mold 14 is provided with a threaded hole. After the bolt passes through the first through hole and the second through hole, it is threadedly connected to the threaded hole to connect the fixing seat 31 to the lower mold 14. This connection method not only has good reliability, but also facilitates disassembly and assembly, and improves the ease of use.

[0049] In another embodiment, the body 311 and the abutment plate 312 are connected by welding, and the abutment plate 312 and the lower mold 14 are also connected by welding, which will not be described in detail here.

[0050] Furthermore, such as Figure 2 and Figure 4As shown, the tapered forming mold 1 also includes a limiting structure, which includes a limiting groove 41 and a limiting protrusion 42. The limiting groove 41 is disposed on the fixed post 32 and extends to the end face of the fixed post 32 near the tapered sleeve mold 20. The limiting protrusion 42 is disposed in the sliding cavity 12. The limiting protrusion 42 and the limiting groove 41 are spaced apart. The limiting protrusion 42 is used to abut against the metal pipe 2. Specifically, in this embodiment, the limiting groove 41 extends along the axial direction of the fixing post 32, and the fixing post 32 is provided with the aforementioned limiting groove 41 on a portion of its structure along its length. The limiting groove 41 extends along the axial direction of the fixing post 32 to the end face of the fixing post 32 near the limiting cavity 12. The limiting protrusion 42 protrudes from the inner wall of the limiting cavity 11. After the fixing post 32 extends into the limiting cavity 11, the limiting protrusion 42 is located at the end of the limiting groove 41 furthest from the sliding cavity 12. This arrangement facilitates the insertion of the fixing post 32 into the limiting cavity 11 and avoids the limiting protrusion 42 affecting the stability of the fixing post 32. Normal installation of the fixed column 32; the bottom of the limiting protrusion 42 and the limiting groove 41 are spaced apart, and during the tapered forming of the metal tube 2, the limiting protrusion 42 can abut against the metal tube 2. When the metal tube 2 is under pressure, the end of the metal tube 2 will deform, causing part of the structure of the metal tube 2 to enter the gap between the limiting protrusion 42 and the limiting groove 41, thereby clamping the metal tube 2, thus avoiding affecting the demolding of the tapered mold 20, improving the work efficiency in the tapered forming process. The deformed part can be removed by machining after the tapered forming is completed.

[0051] Specifically, in this embodiment, as Figure 2 and Figure 3 As shown, the limiting structure includes a limiting groove 41 and a limiting protrusion 42. In other embodiments, the limiting structure may include multiple limiting grooves 41 and multiple limiting protrusions 42. The multiple limiting grooves 41 are arranged at intervals along the circumference of the fixed column 32, and the multiple limiting protrusions 42 are arranged at intervals along the circumference of the inner wall of the limiting cavity 11. The multiple limiting protrusions 42 and the multiple limiting grooves 41 are arranged in a one-to-one correspondence, which can clamp the metal pipe 2 after the tapered forming, thereby facilitating the demolding of the tapered mold 20 and improving the efficiency of the tapered forming of the metal pipe 2.

[0052] Furthermore, the tapered forming mold also includes a limiting block, which is disposed in the sliding cavity and can abut against the tapered sleeve mold. Specifically, in this embodiment, when the tapered sleeve mold 20 abuts against the limiting block, it indicates that the tapered forming process has been completed. The tapered sleeve mold 20 can be demolded under the action of the side-push pressure cylinder, and then the formed metal pipe 2 can be taken out. This arrangement can prevent the tapered sleeve mold 20 from colliding with the mold body 10, thereby improving safety during use.

[0053] Furthermore, such as Figure 2 and Figure 4As shown, the tapered forming mold 1 also includes a connecting assembly 50, which includes a connecting seat 51 and a support rod 52. The support rod 52 is connected between the connecting seat 51 and the tapered mold 20, and the connecting seat 51 is used to connect an external driving component. Specifically, in this embodiment, the external driving component is a side-push pressure cylinder. The telescopic rod of the side-push pressure cylinder is provided with an external thread, and the connecting seat 51 is provided with an internal thread hole, so that the telescopic rod of the side-push pressure cylinder and the connecting seat 51 are threadedly connected. The support rod 52 is connected between the connecting seat 51 and the tapered mold 20, which can ensure that the side-push pressure cylinder can normally drive the tapered mold 20 to move and can provide pressure to the tapered mold 20, thereby ensuring the normal forming of the metal pipe 2.

[0054] Furthermore, multiple support rods 52 are provided, which are evenly distributed around the tapered hole 211 in the circumference, and the axial direction of the support rods 52 is parallel to the axial direction of the tapered hole 211. Specifically, in this embodiment, this arrangement can improve the stability of the tapered die 20 during its movement, thereby ensuring the normal tapered forming of the metal pipe 2.

[0055] Specifically, in this embodiment, the tapered forming mold 1 further includes a guide post. The tapered die 20 is provided with a guide hole, and the guide post is slidably disposed in the guide hole. During the movement of the tapered die 20, the guide post can provide a good guiding effect for the tapered die 20, thereby enabling the tapered hole 211 of the tapered die 20 to have a good alignment effect with the metal pipe 2, thereby improving the tapered forming effect of the metal pipe 2 and increasing the yield.

[0056] The following describes the process of the tapered die 20 tapering the metal tube 2 in this embodiment. First, the tapered die 20 is kept away from the limiting cavity 11; then, the lifting mechanism of the machine is activated, causing the upper die 13 to rise; next, the end of the metal tube 2 is fitted onto the outer periphery of the fixed post 32; then, the lifting mechanism is activated, causing the upper die 13 to reset, and the upper die 13 and lower die 14 are closed; next, the side-push pressure cylinder is activated, causing the telescopic rod of the side-push pressure cylinder to extend, causing the tapered die 20 to move along the direction close to the limiting cavity 11. During the movement, the metal tube 2 will enter the tapered hole 211 and be squeezed to form a tapered shape. During this process, the limiting protrusion 42 will abut against the metal pipe 2, and due to the pressure, part of the metal pipe 2 will enter the gap between the limiting protrusion 42 and the limiting groove 41. Then, the side push pressure cylinder is activated, causing the telescopic rod of the side push pressure cylinder to retract, thereby causing the tapered mold 20 to retract. Since the metal pipe 2 is clamped by the limiting protrusion 42 and the limiting groove 41, it will not affect the normal demolding of the tapered mold 20. Finally, the lifting mechanism is activated, and the lifting mechanism drives the upper mold 13 to rise, and the operator can remove the tapered metal pipe 2.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tapered forming die for tapering metal pipe fittings (2), characterized in that, The tapered forming mold includes: The mold body (10) has a limiting cavity (11) and a sliding cavity (12) that are interconnected. The metal tube (2) is accommodated in the limiting cavity (11) and the sliding cavity (12), and the metal tube (2) is limited in the limiting cavity (11). A tapered die (20) is slidably disposed in the sliding cavity (12) along the direction of approaching or moving away from the limiting cavity (11) under the drive of an external driving component. The tapered die (20) has a tapered hole (211) and the limiting cavity (11) are coaxially disposed. The inner wall of the tapered hole (211) is used to extrude the metal tube (2).

2. The tapered forming mold according to claim 1, characterized in that, The tapered die (20) includes a first tapered die (21) and a second tapered die (22). The first tapered die (21) and the second tapered die (22) are detachably connected. The first tapered die (21) has a tapered hole (211), and the second tapered die (22) has a through hole (221). The through hole (221) and the tapered hole (211) are coaxially arranged. The through hole (221) is used for the metal pipe (2) to pass through.

3. The tapered forming mold according to claim 1, characterized in that, The mold body (10) includes an upper mold (13) and a lower mold (14). The upper mold (13) and the lower mold (14) are movably connected. The upper mold (13) is provided with an upper semicircular arc (131), and the lower mold (14) is provided with a lower semicircular arc (141). The upper semicircular arc (131) and the lower semicircular arc (141) are interlocked to form the limiting cavity (11).

4. The tapered forming mold according to claim 3, characterized in that, The upper mold (13) is provided with an upper groove (132), which is connected to the upper semicircular arc (131) through an upper abutment surface. The lower mold (14) is provided with a lower groove (142), which is connected to the lower semicircular arc (141) through a lower abutment surface. The upper groove (132) and the lower groove (142) form the sliding cavity (12). The upper abutment surface and the lower abutment surface form an abutment surface. The sliding cavity (12) and the limiting cavity (11) are connected through the abutment surface.

5. The tapered forming mold according to claim 1, characterized in that, The tapered forming mold further includes a fixing structure (30), which includes a fixing seat (31) and a fixing column (32). The fixing seat (31) is disposed on the mold body (10) and located on the side of the limiting cavity (11) away from the sliding cavity (12). The fixing column (32) is connected to the fixing seat (31), and at least part of the fixing column (32) is located in the limiting cavity (11).

6. The tapered forming die according to claim 5, characterized in that, The fixing base (31) includes a body (311) and an abutment plate (312). The abutment plate (312) is connected to the body (311) and the abutment plate (312) is used to abut against the mold body (10). The body (311) is provided with a connecting hole, and the fixing column (32) is provided with a connecting threaded hole along its own axial direction. The connecting bolt passes through the connecting hole and is threadedly connected to the connecting threaded hole to detachably connect the fixing column (32) and the body (311).

7. The tapered forming mold according to claim 5, characterized in that, The tapered forming mold also includes a limiting structure, which includes a limiting groove (41) and a limiting protrusion (42). The limiting groove (41) is disposed on the fixed post (32) and extends to the end face of the fixed post (32) near the tapered sleeve mold (20). The limiting protrusion (42) is disposed in the sliding cavity (12). The limiting protrusion (42) and the limiting groove (41) are spaced apart. The limiting protrusion (42) is used to abut against the metal pipe (2).

8. The tapered forming die according to claim 1, characterized in that, The tapered forming mold also includes a limiting block, which is disposed in the sliding cavity (12) and can abut against the tapered sleeve mold (20).

9. The tapered forming die according to any one of claims 1-8, characterized in that, The tapered forming mold also includes a connecting component (50), which includes a connecting seat (51) and a support rod (52). The support rod (52) is supported and connected between the connecting seat (51) and the tapered mold (20). The connecting seat (51) is used to connect an external driving component.

10. The tapered forming die according to claim 9, characterized in that, Multiple support rods (52) are provided, and the multiple support rods (52) are evenly distributed around the tapered hole (211) in the circumference, and the axial direction of the support rods (52) is parallel to the axial direction of the tapered hole (211).

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