Gapless high-roundness bent pipe machining method and equipment

Abstract

The gapless high-roundness bent pipe machining equipment comprises a core bead and a core rod, the core bead is movably installed at one end of the core rod, the core bead comprises a base body, an adjusting block and an adjusting shaft, the base body is installed at one end of the core rod in a swinging mode, the adjusting shaft is installed on the core rod and the base body through a driving mechanism, and the adjusting block is connected with the adjusting shaft. The adjusting shaft is in sliding fit with the base body, the adjusting blocks are in sliding fit with the base body, and the multiple adjusting blocks are arranged around the adjusting shaft; wherein the adjusting shaft comprises a reducing part, and the multiple adjusting blocks are arranged around the reducing part of the adjusting shaft; when the base body swings, the adjusting block moves along with the base body, and the adjusting shaft can passively slide relative to the base body, so that the reducing part of the adjusting shaft pushes the adjusting block to extend out of the base body; in this way, the same device can be used for machining the multi-batch guide pipes of multiple manufacturers within the standard deviation range, and then the die cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of bending pipe shape-preserving mandrels, and particularly to a gapless and high-roundness bending pipe processing method and device. Background Art

[0002] There are many metal ducts designed on equipment such as airplanes, rockets, and spacecrafts to transmit various fluids and support various tasks of the equipment during flight. They are extremely important parts of these equipments. However, due to different manufacturers and batches, the diameters of the same specification pipe fittings are uneven, resulting in the technical problem that the ovality of the bent and formed pipes is unqualified.

[0003] The prior art with the publication number CN219401830U discloses an anti-wrinkle mandrel for bending pipes that is easy to extract the core, including a mandrel element, a T-shaped piece, and a core extraction wire. A plurality of the mandrel elements are connected end to end in sequence to form a mandrel body. A central channel is provided in the center of each mandrel element. A plurality of core extraction channels are communicated in the middle of the central channel. T-shaped pieces are slidably connected in the core extraction channels. A core extraction wire is penetrated between the central channels. The mandrel elements are connected in series in sequence to form a mandrel body. Pulling the core extraction wire can drive the steel balls to move. The maximum diameter of the steel balls abuts against the frustum. The T-shaped piece is at the maximum extended position. The arc-shaped plate fits against the inner wall of the bent pipe, which can play a good supporting role. The maximum diameter of the steel balls is misaligned with the frustum, which can reduce the diameter of the mandrel. Holding one end of the mandrel body can easily extract the core.

[0004] The mandrel in the prior art needs to actively pull the core extraction wire to change the height of the T-shaped piece, but this requires a great deal of difficulty in controlling the movement of the core extraction wire and higher requirements for the pipe blank. Summary of the Invention

[0005] In order to solve the problems in the prior art, the purpose of the present invention is to provide a gapless and high-roundness bending pipe processing method and device, in which the gap between the core beads and the duct can be passively changed during the bending process of the duct, and the gap between the core beads and the duct can be actively changed, reducing the operation difficulty of the mandrel and the difficulty of shape preservation during the bending process of the duct.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A gapless high-roundness elbow pipe processing device includes a core bead and a mandrel. The core bead is movably installed at one end of the mandrel. The core bead includes a base body, an adjusting block, and an adjusting shaft. The base body is swingably installed at one end of the mandrel. The adjusting shaft is connected to the mandrel and the base body through a driving mechanism. The adjusting shaft is slidably matched with the base body, and the adjusting block is slidably matched with the base body. A plurality of adjusting blocks are arranged around the adjusting shaft. Among them, the adjusting shaft includes a variable diameter portion, and a plurality of adjusting blocks are arranged around the variable diameter portion of the adjusting shaft. When the base body swings, the adjusting block follows the movement of the base body, and the adjusting shaft can passively slide relative to the base body, so that the variable diameter portion of the adjusting shaft pushes the adjusting block to protrude from the base body. The driving mechanism can actively drive the adjusting shaft to move in the base body, so that the variable diameter portion of the adjusting shaft pushes the adjusting block to protrude from the base body.

[0007] Preferably, one end of the base body is a connection end, the connection end is frustum-shaped, one end of the mandrel is provided with a hemispherical installation groove, the installation groove is matched with the connection end of the base body, and the connection end of the base body is inserted into the installation groove of the mandrel.

[0008] Preferably, the driving mechanism includes a cable, an elastic member, and an adjusting member. A first through hole is opened on the base body. The adjusting shaft extends into the first through hole of the base body. A baffle is provided at one end of the adjusting shaft. The other end of the adjusting shaft is connected to the mandrel through the adjusting member. The elastic member is arranged between the baffle and the base body. The adjusting member can pull the adjusting shaft through the cable, and the elastic member can tend to reset the adjusting shaft.

[0009] Preferably, the elastic member is a spring. The spring is sleeved on the adjusting shaft, and both ends of the spring abut against the baffle and the base body respectively.

[0010] Preferably, the adjusting member includes a nut and a pull rod. The nut is rotatably installed on the mandrel, and the cable is threadedly connected to the nut.

[0011] Preferably, a second through hole is provided on the mandrel, a third through hole is provided on the pull rod, one end of the pull rod is inserted into the second through hole of the mandrel, the pull rod is rotatably connected to the mandrel, the nut is fixed to the other end of the pull rod, a bolt is fixed on the cable, and the bolt is threadedly connected to the nut.

[0012] Preferably, the outer peripheral surface of the adjusting shaft further includes a first connection portion and a second connection portion. The first connection portion and the second connection portion are connected by a variable diameter portion. One end of the adjusting block is a driving end, and the driving end of the adjusting block is matched with the variable diameter portion and the first connection portion.

[0013] Preferably, the driving end of the adjusting block includes a first arc surface and a second arc surface connected to each other. The second arc surface is inclined. The first arc surface is matched with the first connection portion of the adjusting shaft, and the second arc surface is matched with the variable diameter portion of the adjusting shaft.

[0014] Preferably, the other end of the adjusting block is a conformal end, and the conformal end is arc-shaped.

[0015] A method of using the above gapless high-roundness pipe bending processing equipment. Before bending the conduit, the initial position of the adjusting block on the adjusting shaft is adjusted through the driving mechanism. Then, the core bead and the core rod are inserted into the conduit, and the core bead is located inside the part of the conduit to be bent. When bending the conduit, part of the conduit is bent and deformed, and the inner wall of the conduit acts on the core bead, causing the core bead to swing relative to the core rod. During the movement of the core bead, the base body of the core bead slides relative to the adjusting shaft, and the variable diameter part of the adjusting shaft pushes the adjusting block to extend out of the base body, so that the adjusting block supports the inner wall of the conduit. When shaping the bent part of the conduit, the adjusting block is driven to continue to extend out by driving the adjusting shaft through the driving mechanism, so that the adjusting block pushes the inner wall of the conduit to perform shaping operations on the conduit. When the core rod is withdrawn, the position of the adjusting block on the adjusting shaft is adjusted through the driving mechanism, so that the adjusting block can be reset, and then the equipment can be smoothly withdrawn from the conduit.

[0016] The beneficial effect of the technical solution of the present invention is that the adjusting block on the core bead can be passively extended during the pipe bending process, and the extension length of the adjusting block can also be actively controlled through the driving mechanism. In this way, the same device can be used to process conduits from multiple manufacturers and multiple batches within the standard deviation range, which can reduce the mold cost, reduce the mold change time, and improve the production efficiency. Description of the Drawings

[0017] Figure 1 Structural schematic of the gapless high-roundness pipe bending processing equipment Figure 1 ; Figure 2 Structural schematic of the gapless high-roundness pipe bending processing equipment Figure 2 ; Figure 3 Structural schematic of the base body Figure 1 ; Figure 4 Structural schematic of the base body Figure 2 ; Figure 5 Structural schematic diagram of the adjusting block; Figure 6 Structural schematic diagram of the adjusting shaft; Figure 7 Structural schematic diagram of the core rod.

[0018] Reference numerals: 11, mandrel; 111, mounting groove; 12, connecting member; 121, ball head end; 13, base body; 131, first through hole; 132, first accommodating groove; 133, jack; 134, second accommodating groove; 135, connecting end; 14, adjusting block; 141, conformal end; 142, first arc surface; 143, second arc surface; 15, adjusting shaft; 151, first connecting portion; 152, diameter-changing portion; 153, second connecting portion; 154, baffle; 16, elastic member. Detailed implementation manners

[0019] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0022] In the present invention, unless otherwise clearly specified and defined, the terms "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature. Embodiment

[0024] As Figures 1 to 7 shown, a gapless high roundness elbow pipe processing device includes a core bead and a mandrel 11, and the core bead is movably mounted at one end of the mandrel 11; The core bead includes a base body 13, an adjusting block 14 and an adjusting shaft 15. The base body 13 is swingably mounted at one end of the mandrel 11. The adjusting shaft 14 is mounted on the mandrel 11 and connected to the base body 13 through a driving mechanism. The adjusting shaft 15 is slidably engaged with the base body 13, and the adjusting block 14 is slidably engaged with the base body 13. A plurality of adjusting blocks 14 are arranged around the adjusting shaft 15; wherein, the adjusting shaft 15 includes a variable diameter portion 152, and a plurality of adjusting blocks 14 are arranged around the variable diameter portion 152 of the adjusting shaft 15; When the base body 13 swings, the adjusting block 14 moves along with the base body 13, and the adjusting shaft 15 can passively slide relative to the base body 13, so that the variable diameter portion 152 of the adjusting shaft 15 pushes against the adjusting block 14 to protrude from the base body 13; The driving mechanism can actively drive the adjusting shaft 15 to move within the base body 13, so that the variable diameter portion 152 of the adjusting shaft 15 pushes against the adjusting block 14 to protrude from the base body 13.

[0025] With such a setting, the adjusting blocks on the core bead can protrude passively during the elbow pipe processing, and the protruding length of the adjusting blocks can also be actively controlled by the driving mechanism. In this way, the same device can be used to process ducts from multiple manufacturers and multiple batches within the standard deviation range, thereby reducing the mold cost, shortening the mold change time, and improving the production efficiency.

[0026] In this embodiment, as Figure 2 , Figure 4 and Figure 7 shown, one end of the base body 13 is a connection end 135, and the connection end 135 is frustum-shaped. One end of the mandrel 11 is provided with a hemispherical installation groove 111, and the installation groove 111 is matched with the connection end 135 of the base body 13. The connection end 135 of the base body 13 is inserted into the installation groove 111 of the mandrel 11. In this way, the base body can swing freely in all directions on the mandrel.

[0027] In this embodiment, as shown in Figure 1 and Figure 2 , the driving mechanism includes a cable 12, an elastic member 16 and an adjusting member; a first through hole 131 is formed in the base body 13, the adjusting shaft 15 extends into the first through hole 131 of the base body 13, a baffle 154 is arranged at one end of the adjusting shaft 15, the other end of the adjusting shaft 15 is connected to the mandrel 11 through the adjusting member, the elastic member 16 is arranged between the baffle 154 and the base body 13, the adjusting member can pull the adjusting shaft through the cable, and the elastic member 16 can tend to reset the adjusting shaft.

[0028] Further preferably, as shown in Figure 2 and Figure 3 , the elastic member 16 is a spring, the spring is sleeved on the adjusting shaft 15, and both ends of the spring are abutted against the baffle 154 and the base body 13 respectively; wherein, one end of the base body 13 facing the baffle 154 is provided with a second receiving groove 134, the second receiving groove 134 is communicated with the first through hole 131, one end of the spring is abutted against the inner wall of the second receiving groove 134, and the baffle 154 can move into the second receiving groove 134. Thus, after the cable is relaxed, the spring can push against the baffle to drive the adjusting shaft to reset.

[0029] Further preferably, as shown in Figure 1 and Figure 2 , the adjusting member includes a nut 18 and a pull rod 17, the nut 18 is rotatably installed on the mandrel 11, and the cable 12 is threadedly connected to the nut 18. Specifically, as shown in Figure 7 , a second through hole 112 is provided on the mandrel 11, a third through hole is provided on the pull rod 17, one end of the pull rod 17 is inserted into the second through hole 112 of the mandrel 11, the pull rod 17 is rotatably connected to the mandrel 11, the nut 18 is fixed to the other end of the pull rod 17, a bolt is fixed on the cable 12, and the bolt is threadedly connected to the nut 18. Thus, by rotating the pull rod, it can tend to move the bolt and the nut 18 relative to each other, and further drive the cable to drive the adjusting shaft to move.

[0030] In this embodiment, as shown in Figures 2 to 6 , the outer peripheral surface of the adjusting shaft 15 further includes a first connecting portion 151 and a second connecting portion 153, and the first connecting portion 151 and the second connecting portion 153 are connected by a reduced-diameter portion 152; one end of the adjusting block 14 is a driving end, and the driving end of the adjusting block 14 is matched with the reduced-diameter portion 152 and the first connecting portion 151; Specifically, the driving end of the adjusting block 14 includes a first arc surface 142 and a second arc surface 143 connected to each other, the second arc surface 143 is inclined, the first arc surface 142 is matched with the first connecting portion 151 of the adjusting shaft 15, and the second arc surface 143 is matched with the reduced-diameter portion 152 of the adjusting shaft 15. With such a setting, it can ensure that the adjusting block and the adjusting shaft have sufficient contact surfaces, and further ensure the smooth movement of the adjusting block.

[0031] In this embodiment, as Figures 1 to 4 described, the second connecting portion 153, the diameter-changing portion 152, and the first connecting portion 151 on the adjusting shaft 15 are inserted into the first through hole 131 of the base body 13; a jack 133 communicating with the first through hole 131 is provided on the outer peripheral surface of the base body 13; the diameter-changing portion 152 is located in the first through hole 131, the driving end of the adjusting block 14 passes through the jack 133 and then extends into the first through hole 131, and the first arc surface 142 and the second arc surface 143 on the adjusting block 14 can abut against the first connecting portion 151 and the diameter-changing portion 152 of the adjusting shaft 15. With such a setting, through the first connecting portion and the first arc surface, a certain initial stroke of the adjusting block on the adjusting shaft can be ensured, and the initial position of the adjusting block on the adjusting shaft can be adjusted through the adjusting mechanism, thereby effectively avoiding the premature extension of the adjusting block caused by misoperation.

[0032] In this embodiment, as Figures 1 to 3 shown, the other end of the adjusting block 14 is a conformal end 141, and the adjusting block 14 pushes against the inner wall of the catheter through the conformal end 141; a first accommodating groove 132 is provided on the outer peripheral surface of the base body 13, the first accommodating groove 132 is annular, and the first accommodating groove 132 and the first through hole 131 communicate through the jack 133; the conformal end 141 of the adjusting block 14 is located in the first accommodating groove 132 of the base body 13, and the adjusting block 14 passes through the jack 133 so that the driving end abuts against the adjusting shaft 15. Among them, the conformal end 141 is arc-shaped. With such a setting, the initial shape of the core bead is ensured, and the shape stability of the catheter can be improved A pipe bending method using the above gapless and high-roundness pipe bending equipment; Before bending the catheter, the initial position of the adjusting block 14 on the adjusting shaft 15 is adjusted through the driving mechanism, and then the core bead and the core rod 11 are inserted into the catheter so that the core bead is located inside the portion of the catheter to be bent. Specifically, when adjusting the initial position of the adjusting block 14, first rotate the pull rod 17 to loosen the cable 12, and then the spring pushes the adjusting shaft 15 to move, adjusting the initial position of the adjusting block 14 on the first connecting portion 151 of the adjusting shaft 15.

[0033] When bending the catheter, part of the catheter is bent and deformed, and the inner wall of the catheter acts on the core bead, causing the core bead to swing relative to the core rod 11; during the movement of the core bead, the base body 13 of the core bead slides relative to the adjusting shaft 15, and the diameter-changing portion of the adjusting shaft 15 pushes the adjusting block 14 to extend out of the base body 13, so that the adjusting block 14 supports the inner wall of the catheter; when shaping the bent portion of the catheter, the adjusting shaft 15 is driven by the driving mechanism to make the adjusting block 14 continue to protrude, so that the adjusting block 14 pushes against the inner wall of the catheter to perform shaping operations on the catheter. Specifically, during the catheter shaping process, first rotate the pull rod 17 to tighten the cable 12, the cable 12 pulls the adjusting shaft 15 to move, and the adjusting shaft 15 pushes the adjusting block 14 to continue to extend.

[0034] When extracting the core rod, the position of the adjusting block 14 on the adjusting shaft 15 is adjusted through the driving mechanism, so that the adjusting block 14 can be reset, and then the device can be smoothly extracted from the catheter. Specifically, first rotate the pull rod 17 to loosen the cable 12, and then the spring pushes the adjusting shaft 15 to move, adjusting the position of the adjusting block 14 on the adjusting shaft 15. Embodiment

[0035] Different from the above Embodiment 1, a reset member is provided between the adjusting block and the base body. Specifically, the reset member is a spring, and the two ends of the spring are respectively connected to the adjusting block and the base body; wherein, a third accommodation groove is provided on the adjusting block, and a fourth accommodation groove is provided on the inner wall of the jack. The third accommodation groove and the fourth accommodation groove cooperate to form a reset space, and the spring is arranged in the reset space, and the two ends of the spring are respectively connected to the inner walls of the third accommodation groove and the fourth accommodation groove. The other structures of this embodiment are the same as those described in Embodiment 1.

[0036] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A gapless high-roundness bending tube processing device, comprising a core bead and a core rod (11), wherein the core bead is movably mounted on one end of the core rod (11), characterized in that: The core bead comprises a base body (13), an adjustment block (14) and an adjustment shaft (15); the base body (13) is mounted on one end of a core rod (11) in a swingable manner; the adjustment shaft (14) is mounted on the core rod (11) and connected to the base body (13) via a driving mechanism; the adjustment shaft (15) is slidably matched with the base body (13); the adjustment block (14) is slidably matched with the base body (13); a plurality of adjustment blocks (14) are arranged around the adjustment shaft (15); wherein the adjustment shaft (15) comprises a diameter-changing portion (152); and a plurality of adjustment blocks (14) are arranged around the diameter-changing portion (152) of the adjustment shaft (15); When the base (13) swings, the adjustment block (14) moves along with the base (13), and the adjustment shaft (15) can passively slide relative to the base (13), so that the diameter-changing portion (152) of the adjustment shaft (15) pushes the adjustment block (14) out of the base (13); The driving mechanism can actively drive the adjusting shaft (15) to move in the base body (13), so that the diameter-changing portion (152) of the adjusting shaft (15) pushes the adjusting block (14) to extend out from the base body (13).

2. The gapless high roundness pipe bending processing equipment according to claim 1 is characterized in that: One end of the base (13) is a connecting end (135), which is in a truncated cone shape. One end of the mandrel (11) is provided with a hemispherical mounting groove (111), which matches the connecting end (135) of the base (13), and the connecting end (135) of the base (13) is inserted into the mounting groove (111) of the mandrel (11).

3. The gapless high roundness pipe bending processing equipment according to claim 1 is characterized in that: The driving mechanism comprises a cable (12), an elastic member (16) and an adjusting member; a first through hole (131) is provided on the base (13), the adjusting shaft (15) extends into the first through hole (131) of the base (13), a baffle (154) is provided at one end of the adjusting shaft (15), the other end of the adjusting shaft (15) is connected to the core rod (11) through the adjusting member, the elastic member (16) is provided between the baffle (154) and the base (13), the adjusting member can pull the adjusting shaft through the cable, and the elastic member (16) can tend to reset the adjusting shaft.

4. The gapless high roundness pipe bending processing equipment according to claim 3 is characterized in that: The elastic member (16) is a spring, which is sleeved on the adjustment shaft (15), and two ends of the spring respectively abut against the baffle (154) and the base (13).

5. The gapless high roundness pipe bending processing equipment according to claim 3 is characterized in that: The adjusting member comprises a nut (18) and a pull rod (17); the nut (18) is rotatably mounted on the core rod (11); and the pull cable (12) is threadedly connected to the nut (18).

6. The gapless high roundness pipe bending processing equipment according to claim 5 is characterized in that: A second through hole (112) is provided on the mandrel (11), a third through hole is provided on the pull rod (17), one end of the pull rod (17) is inserted into the second through hole (112) of the mandrel (11), the pull rod (17) is rotatably connected to the mandrel (11), a nut (18) is fixed to the other end of the pull rod (17), a bolt is fixed to the cable (12), and the bolt is threadedly connected to the nut (18).

7. The gapless high roundness pipe bending processing equipment according to claim 1 is characterized by: The outer circumferential surface of the adjusting shaft (15) further comprises a first connecting portion (151) and a second connecting portion (153), wherein the first connecting portion (151) and the second connecting portion (153) are connected via a diameter reducing portion (152); one end of the adjusting block (14) is a driving end, and the driving end of the adjusting block (14) matches the diameter reducing portion (152) and the first connecting portion (151).

8. The gapless high roundness pipe bending processing equipment according to claim 7 is characterized in that: The driving end of the adjustment block (14) comprises a first curved surface (142) and a second curved surface (143) which are connected to each other. The second curved surface (143) is arranged obliquely. The first curved surface (142) matches the first connecting portion (151) of the adjustment shaft (15), and the second curved surface (143) matches the diameter-changing portion (152) of the adjustment shaft (15).

9. The gapless high roundness pipe bending processing equipment according to claim 8 is characterized in that: The other end of the adjustment block (14) is a conformal end (141), and the conformal end (141) is arc-shaped.

10. A method for using the gapless high roundness pipe bending processing equipment according to any one of claims 1 to 9, characterized in that: Before bending the catheter, the initial position of the adjustment block (14) on the adjustment shaft (15) is adjusted by a driving mechanism, and then the core bead and the core rod (11) are inserted into the catheter so that the core bead is located within the portion of the catheter to be bent; When the catheter is bent, part of the catheter is bent and deformed, and the inner wall of the catheter acts on the core bead, causing the core bead to swing relative to the core rod (11); during the movement of the core bead, the base body (13) of the core bead and the adjustment shaft (15) slide relative to each other, and the variable diameter portion of the adjustment shaft (15) pushes the adjustment block (14) out of the base body (13), thereby causing the adjustment block (14) to support the inner wall of the catheter; when it is necessary to reshape the bent portion of the catheter, the drive mechanism drives the adjustment shaft (15) to cause the adjustment block (14) to continue to push out, thereby causing the adjustment block (14) to push the inner wall of the catheter, thereby performing a shaping operation on the catheter; When the core rod is pulled out, the position of the adjustment block (14) on the adjustment shaft (15) is adjusted by the driving mechanism so that the adjustment block (14) can be reset, thereby enabling the device to be smoothly pulled out of the catheter.

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