Drawing die for disc drawing machine

Abstract

The utility model relates to a drawing die for a disc drawing machine, which belongs to the technical field of drawing dies and comprises an inner die and an outer die, the inner die comprises a feeding section, a deformation section and a sizing section, and the drawing die is characterized in that the inner die is connected with a cylindrical shaping part, the shaping part is flexibly arranged, the outer diameter of the shaping part is consistent with that of the sizing section of the inner die, and the outer diameter of the outer die is consistent with that of the sizing section of the inner die. And a connecting piece for connecting the shaping part is arranged on the inner mold. The hollow pipe drawing machine has the effect of ensuring the quality of hollow pipes drawn by the disc drawing machine.

Description

Technical Field

[0001] This utility model relates to the technical field of drawing dies, and in particular to a drawing die for a coil drawing machine. Background Technology

[0002] A drawing machine is a machine that uses drawing dies to cause continuous plastic deformation of hollow tubes or shells, gradually changing the diameter, wall thickness, or surface structure of the hollow tubes or shells.

[0003] The drawing die is an important component of the coil drawing machine, which includes an outer die and an inner die. In actual use, it has been found that the hollow tubes drawn by the coil drawing machine will be subjected to additional bending stress the moment they come into contact with the drum in the coil drawing machine. During this process, the hollow tubes that have just been drawn are prone to deformation, especially small-diameter and thin-walled hollow tubes. In severe cases, the tubes may even break, affecting the quality of the hollow tubes after being drawn by the coil drawing machine. Utility Model Content

[0004] In order to ensure the quality of hollow tubes after being drawn by a coil drawing machine, this application provides a drawing die for a coil drawing machine.

[0005] This application provides a drawing die for a coil drawing machine, which adopts the following technical solution:

[0006] A drawing die for a drawing machine includes an inner die and an outer die. The inner die includes a feeding section, a deformation section and a sizing section. A cylindrical shaping part is connected to the inner die. The shaping part is flexibly arranged. The outer diameter of the shaping part is the same as the outer diameter of the sizing section of the inner die. A connecting member for connecting the shaping part is provided on the inner die.

[0007] By adopting the above technical solution, and through the setting of the shaping part, when the pipe is subjected to additional bending stress at the moment of contact with the drum in the coiling machine, the shaping part can provide support for the pipe, making it less prone to deformation, thereby effectively ensuring the quality of the hollow pipe after being drawn by the coiling machine.

[0008] Preferably, the shaping part is made of polyurethane.

[0009] By adopting the above technical solution, polyurethane has good elasticity, wear resistance, oil resistance, low temperature resistance and aging resistance, and can be used multiple times, effectively ensuring the service life of the shaping part, thereby reducing the use cost of the shaping part.

[0010] Preferably, the end of the shaping portion away from the inner mold extends to the point of maximum stress during pipe bending.

[0011] By adopting the above technical solution, the end of the shaping part away from the inner mold extends to the maximum stress point of the pipe bending. On the one hand, the shaping part can provide continuous support to the pipe when it is bent, making the pipe less prone to deformation. On the other hand, the length of the shaping part will not affect the storage of the bent pipe, nor will it make it difficult for the shaping part to detach from the pipe. This ensures the quality of the pipe while guaranteeing the normal use of the coiling machine.

[0012] Preferably, the shaping part is provided with a fixing plate, which is located at one end of the shaping part near the inner mold. A rotating plate is rotatably connected to the fixing plate, and the shaping part can rotate relative to the inner mold under the cooperation of the fixing plate and the rotating plate.

[0013] By adopting the above technical solution, through the cooperation of the rotating disk and the fixed disk, when the shaping part rotates relative to the inner mold inside the pipe, the force on the steel rope when the shaping part rotates is effectively reduced, so that the shaping part is not easy to separate from the inner mold, effectively extending the service life of the shaping part, and the shaping part is not easy to fall off into the pipe and be difficult to find.

[0014] Preferably, the connector includes a steel rope, and the inner mold is coaxially provided with a fitting cavity for fitting the steel rope, and the end of the steel rope away from the inner mold is coaxially connected to the rotating disk.

[0015] By adopting the above technical solution, steel ropes are readily available and easy to handle.

[0016] Preferably, the connecting component includes a control bolt and a steel ring. The steel ring is coaxially connected to the rotating disk and is flexibly configured. The inner mold is coaxially provided with a control threaded hole that engages with the control bolt. The control bolt includes a screw head and a threaded post. Both the screw head and the threaded post are provided with control grooves for the steel ring to fit into.

[0017] By adopting the above technical solution, on the one hand, the shaping part and the inner mold are connected in a detachable manner, which facilitates the assembly and disassembly of the shaping part and the inner mold, thereby making it easier to replace the worn shaping part and effectively extending its service life. On the other hand, the steel ring used to connect the shaping part and the inner mold is not easy to separate from the inner mold, which effectively improves the fixing strength of the shaping part and the inner mold.

[0018] Preferably, the inner mold is provided with a control countersunk hole for accommodating the screw head.

[0019] By adopting the above technical solution and controlling the countersunk hole, the screw head of the control bolt is effectively accommodated. The control bolt is housed in the inner mold, so the control bolt is not easy to rotate under the action of other external forces, thus ensuring the reliability of the fixing part through the cooperation between the control bolt and the control threaded hole.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By setting the shaping part, when the tube is subjected to additional bending stress at the moment of contact with the drum in the coiling machine, the shaping part can provide support for the tube, making it less prone to deformation, thereby effectively ensuring the quality of the hollow tube after being drawn by the coiling machine.

[0022] 2. The end of the shaping part away from the inner mold extends to the point of maximum stress when the pipe is bent. On the one hand, the shaping part can provide continuous support to the pipe when it is bent, making the pipe less prone to deformation. On the other hand, the length of the shaping part will not affect the storage of the bent pipe, nor will it make it difficult for the shaping part to detach from the pipe. This ensures the quality of the pipe while ensuring the normal operation of the coiling machine. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0024] Figure 2 This is a schematic diagram of the connection between the inner mold and the shaping part in Embodiment 2 of this application.

[0025] Figure 3 This is a detailed diagram of the fit between the steel ring and the control bolt in Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Inner mold; 11. Feeding section; 12. Deformation section; 13. Sizing section; 14. Fitting cavity; 2. Outer mold; 21. Feeding cavity; 22. Deformation cavity; 23. Sizing cavity; 3. Shaping section; 31. Fixed plate; 32. Fixed column; 321. Friction-enhancing groove; 33. Rotating plate; 331. Steel rope; 4. Control bolt; 41. Steel ring; 42. Control threaded hole; 43. Screw head; 44. Threaded column; 45. Control groove. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0028] Example 1: This application discloses a drawing die for a drawing machine, referring to... Figure 1 The pipe includes an inner mold 1 and an outer mold 2. The inner mold 1 includes a feeding section 11, a deformation section 12 and a sizing section 13. The outer mold 2 includes a feeding cavity 21, a deformation cavity 22 and a sizing cavity 23. The inner mold 1 is located inside the pipe and the outer mold 2 is located outside the pipe. The inner mold 1 and the outer mold 2 work together to change the diameter and wall thickness of the pipe.

[0029] Reference Figure 1The inner mold 1 is connected to a cylindrical shaping part 3, which is flexible and has an outer diameter that is the same as the outer diameter of the sizing section 13 of the inner mold 1. With the shaping part 3, when the tube is subjected to additional bending stress at the moment of contact with the drum in the coiling machine, the shaping part 3 can provide support for the tube, making it less prone to deformation, thereby effectively ensuring the quality of the hollow tube after being drawn by the coiling machine.

[0030] Reference Figure 1 The shaping part 3 is made of polyurethane, which has good elasticity, wear resistance, oil resistance, low temperature resistance, and aging resistance. It can be used multiple times, effectively ensuring the service life of the shaping part 3 and thus reducing the operating cost. The end of the shaping part 3 away from the inner mold 1 extends to the maximum stress point of the tube bending. On the one hand, the shaping part 3 can provide support for the tube when bending, making the tube less prone to deformation. On the other hand, the length of the shaping part 3 is not too long, so it will not affect the storage of the bent tube, nor will it make it difficult for the shaping part 3 to detach from the tube. This ensures both the quality of the tube and the normal operation of the coiling machine.

[0031] Reference Figure 1 The shaping part 3 is provided with a fixing plate 31, and a fixing post 32 is integrally formed on the fixing plate 31. The fixing post 32 is provided with multiple friction-enhancing grooves 321. During the shaping process of the shaping part 3, the fixing plate 31 is placed into the forming mold of the shaping part 3, so that the fixing post 32 is deeply inserted into the shaping part 3, ensuring the connection strength between the shaping part 3 and the fixing plate 31. The setting of the friction-enhancing grooves 321 makes it difficult for the shaping part 3 to detach from the fixing plate 31.

[0032] Reference Figure 1 The fixed plate 31 is located at one end of the shaping part 3 near the inner mold 1. A rotating plate 33 is rotatably connected to the fixed plate 31. The inner mold 1 is provided with a connector for connecting the shaping part 3. The connector includes a steel rope 331. The inner mold 1 is coaxially provided with a fitting cavity 14 for the steel rope 331 to fit into. After the steel rope 331 is inserted into the fitting cavity 14, it can be fixed to the inner mold 1 by adhesive or welding. The end of the steel rope 331 away from the inner mold 1 is coaxially fixed to the rotating plate 33. In this embodiment, the steel rope 331 is fixed to the inner mold 1 or the rotating plate 33 by adhesive, so that the shaping part 3 is connected to the inner mold 1. The steel rope 331 is easy to obtain and easy to operate. By cooperating with the rotating disk 33 and the fixed disk 31, when the shaping part 3 rotates relative to the inner mold 1 inside the pipe, the force exerted on the steel rope 331 by the rotating part 3 is effectively reduced, so that the shaping part 3 is not easy to separate from the inner mold 1, effectively extending the service life of the shaping part 3, and the shaping part 3 is not easy to fall out of the pipe and be difficult to find.

[0033] Example 2 differs from Example 1 in that, referring to... Figure 2 and Figure 3 The connecting parts include a control bolt 4 and a steel ring 41. The end of the steel ring 41 is coaxially welded and fixed to the rotating disk 33. The steel ring 41 is made of a flexible material and can change its shape under the action of external force. The inner mold 1 is coaxially provided with a control thread hole 42 that is threaded to the control bolt 4. The control bolt 4 includes a screw head 43 and a threaded post 44. Both the screw head 43 and the threaded post 44 are provided with control grooves 45 for the steel ring 41 to fit into. In the actual assembly process, the end of the steel ring 41 away from the rotating disk 33 can be embedded into the control groove 45, thereby fixing the steel ring 41 to the control bolt 4. Then, the control bolt 4 is screwed into the control threaded hole 42, thereby fixing the shaping part 3 to the inner mold 1. On the one hand, the shaping part 3 and the inner mold 1 are connected in a detachable manner, which facilitates the disassembly and assembly of the shaping part 3 and the inner mold 1, thereby facilitating the replacement of the worn shaping part 3 and effectively extending its service life. On the other hand, the steel ring 41 used to connect the shaping part 3 and the inner mold 1 is not easy to separate from the inner mold 1, which effectively improves the strength of the fixing between the shaping part 3 and the inner mold 1.

[0034] Reference Figure 2 The inner mold 1 is provided with a control countersunk hole for accommodating the screw head 43. By setting the control countersunk hole, the screw head 43 of the control bolt 4 is effectively accommodated. The control bolt 4 is housed in the inner mold 1, so the control bolt 4 is not easy to rotate under the action of other external forces, thus ensuring the reliability of fixing the shaping part 3 by the cooperation of the control bolt 4 and the control threaded hole 42.

[0035] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drawing die for a drawing machine, comprising an inner die (1) and an outer die (2), wherein the inner die (1) comprises a feeding section (11), a deformation section (12), and a sizing section (13), characterized in that, The inner mold (1) is connected to a cylindrical shaping part (3), which is flexibly arranged. The outer diameter of the shaping part (3) is consistent with the outer diameter of the sizing section (13) of the inner mold (1). The inner mold (1) is provided with a connector for connecting the shaping part (3).

2. The drawing die for a disc drawing machine according to claim 1, wherein The shaping part (3) is made of polyurethane.

3. The drawing die for a disc drawing machine according to claim 2, wherein The shaping part (3) extends away from the inner mold (1) to the point of maximum stress when the pipe is bent.

4. The draw die for a disc draw machine according to claim 3, wherein The shaping part (3) is provided with a fixing plate (31), which is located at one end of the shaping part (3) near the inner mold (1). A rotating plate (33) is rotatably connected to the fixing plate (31). The shaping part (3) can rotate relative to the inner mold (1) with the cooperation of the fixing plate (31) and the rotating plate (33).

5. The draw die for a disc draw machine according to claim 4, wherein The connector includes a steel rope (331), and the inner mold (1) is coaxially provided with a fitting cavity (14) for fitting the steel rope (331). The end of the steel rope (331) away from the inner mold (1) is coaxially connected to the rotating disk (33).

6. The draw die for a disc draw machine according to claim 4, wherein The connector includes a control bolt (4) and a steel ring (41). The steel ring (41) is coaxially connected to the rotating disk (33). The steel ring (41) is flexibly arranged. The inner mold (1) is coaxially provided with a control thread hole (42) that is threaded to the control bolt (4). The control bolt (4) includes a screw head (43) and a threaded post (44). Both the screw head (43) and the threaded post (44) are provided with control grooves (45) for the steel ring (41) to fit into.

7. The draw die for a disc draw machine according to claim 6, wherein The inner mold (1) is provided with a control countersunk hole for accommodating the screw head (43).

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