A pipe cold drawing device
By setting collinear first and second cold drawing holes in the pipe cold drawing device, the probability of pipe breakage during the cold drawing process is reduced by using a two-stage cold drawing method, thus achieving stable and efficient cold drawing processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIKURA HENGTONG AERIAL CABLE SYST
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-10
AI Technical Summary
The probability of fracture of the composite optical cable ground wire is relatively high during the cold drawing process due to local stress concentration in the aluminum tube.
A pipe cold drawing device was designed. By setting a first cold drawing hole and a second cold drawing hole with their center lines collinear, the pipe moves along the center line of the first cold drawing hole and passes through the two holes in sequence. The cold drawing is performed by taking advantage of the fact that the diameter of the second cold drawing hole is smaller than that of the first cold drawing hole, thereby reducing the single cold drawing force and thus reducing the probability of breakage.
The double cold drawing process reduces the probability of pipe breakage during cold drawing, thus improving the stability and reliability of the process.
Smart Images
Figure CN224475458U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold drawing equipment technology, and in particular to a pipe cold drawing equipment. Background Technology
[0002] Composite optical fiber grounding wires are cables constructed using power transmission lines, typically used by power companies. They consist of a stainless steel conduit and one or more optical fibers inside, with an aluminum conduit covering the stainless steel. During production, composite optical fiber grounding wires undergo a cold-drawing process. Because the aluminum conduit may have slight bending in some areas during previous processing, some sections may break due to localized stress concentration during the cold-drawing process. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to provide a pipe cold drawing device that can reduce the probability of pipe breakage during the cold drawing process.
[0004] To solve the above-mentioned technical problems, this utility model provides a pipe cold drawing device, including: a support platform; a first cold drawing component connected to the support platform, the first cold drawing component including a first module, the first module having a first cold drawing hole; and a second cold drawing component connected to the support platform, the second cold drawing component including a second module, the second module having a second cold drawing hole, the diameter of the second cold drawing hole being smaller than the diameter of the first cold drawing hole, and the extension line of the center line of the second cold drawing hole being collinear with the extension line of the center line of the first cold drawing hole.
[0005] In one embodiment of the present invention, a first receiving groove is provided on the support platform, and the first cold drawing component and the second cold drawing component are both located in the first receiving groove. A first material passage is provided on the opposite side of the first receiving groove, and the extension line of the center line of the first cold drawing hole passes through the first material passage.
[0006] In one embodiment of the present invention, the first cold-drawing assembly further includes at least two positioning blocks, the positioning blocks abutting against the sidewall of the first receiving groove, the first module being located between the two positioning blocks, and the first module abutting against the positioning blocks.
[0007] In one embodiment of the present invention, a base is also included, the base including a second receiving groove, and the support platform is located in the second receiving groove.
[0008] In one embodiment of the present invention, a plurality of support columns are connected to the bottom of the second receiving groove, and the ends of the support columns are connected to the support platform.
[0009] In one embodiment of the present invention, a second material passage is provided on the opposite side of the second receiving groove, and the extension line of the center line of the first cold-drawn hole passes through the second material passage.
[0010] In one embodiment of this utility model, the support platform is connected to a water inlet pipe, the end of which is located at the bottom of the first receiving groove, and the base is connected to a water outlet pipe, the end of which is located at the side wall of the second receiving groove.
[0011] In one embodiment of this utility model, a water tank and a water pump are connected between the water inlet pipe and the water outlet pipe. The water inlet pipe is connected to the water tank, the input end of the water pump is connected to the water tank, and the output end of the water pump is connected to the water outlet pipe.
[0012] In one embodiment of this utility model, the outlet end of the water outlet pipe is higher than the inlet end of the water inlet pipe. In another embodiment of this utility model, the first cold-drawing assembly further includes a locking block, which is connected to the support platform. The side wall of the first module is provided with a locking groove, and the locking block engages with the locking groove.
[0013] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0014] The pipe cold drawing device of this utility model allows the pipe to be cold-drawn to pass through the first and second cold drawing holes sequentially by moving along the extension of the center line of the second cold drawing hole and the extension of the center line of the first cold drawing hole. The diameter of the second cold drawing hole is smaller than that of the first cold drawing hole, so that the pipe to be cold-drawn completes the straightening and slight deformation of the pipe through the first cold drawing hole, and completes the final cold drawing process through the second cold drawing hole. In this way, the force on the pipe is reduced by the two cold drawing processes, thereby reducing the probability of pipe breakage during the cold drawing process. Attached Figure Description
[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0016] Figure 1 This is a front view of the internal structure of a pipe cold drawing device according to this utility model;
[0017] Figure 2 This is a top view of the pipe cold drawing device;
[0018] Figure 3 This is a left view of the pipe cold drawing device;
[0019] Figure 4 yes Figure 3A partial sectional view.
[0020] Explanation of reference numerals in the accompanying drawings: 1. Support platform; 2. First cold drawing assembly; 3. Second cold drawing assembly; 4. Base; 5. Water tank; 6. Water pump; 11. First receiving groove; 12. Support column; 13. First material passage; 21. Positioning block; 22. First module; 23. First cold drawing hole; 24. Locking block; 31. Second module; 32. Second cold drawing hole; 41. Second receiving groove; 42. Second material passage; 51. Water outlet pipe; 61. Water inlet pipe. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.
[0022] Reference Figure 1 and Figure 2 As shown, a pipe cold drawing device of this utility model includes: a support platform 1; a first cold drawing component 2 connected to the support platform 1, the first cold drawing component 2 including a first module 22, the first module 22 having a first cold drawing hole 23; and a second cold drawing component 3 connected to the support platform 1, the second cold drawing component 3 including a second module 31, the second module 31 having a second cold drawing hole 32, the diameter of the second cold drawing hole 32 being smaller than the diameter of the first cold drawing hole 23, and the extension line of the center line of the second cold drawing hole 32 being collinear with the extension line of the center line of the first cold drawing hole 23.
[0023] This embodiment of a pipe cold drawing device involves sequentially passing the pipe to be cold drawn through the first cold drawing hole 23 of the first module 22 and the second cold drawing hole 32 of the second module 31, thereby completing the cold drawing process of the pipe. Since the extension line of the centerline of the second cold drawing hole 32 is collinear with the extension line of the centerline of the first cold drawing hole 23, the pipe can move along the extension line of the centerline of the first cold drawing hole 23 to sequentially pass through the first cold drawing hole 23 and the second cold drawing hole 32. Since the diameter of the second cold drawing hole 32 is smaller than the diameter of the first cold drawing hole 23, the pipe undergoes straightening and slight deformation as it passes through the first cold drawing hole 23, and the final cold drawing process is completed as it passes through the second cold drawing hole 32. This two-stage cold drawing method reduces the force exerted on the pipe in a single process, lowering the probability of breakage during cold drawing.
[0024] The support platform 1 is used to support the first cold drawing assembly 2 and the second cold drawing assembly 3. The support platform 1 is provided with a first receiving groove 11, and a first material passage 13 is provided on the opposite side of the first receiving groove 11. The first material passage 13 penetrates the side wall of the support platform 1 and is used for the tube to be cold drawn to pass through.
[0025] Reference Figure 2 , Figure 3 and Figure 4 As shown, the first cold-drawing assembly 2 is connected to the support platform 1 and located within the first receiving groove 11. The first cold-drawing assembly 2 includes a first module 22, which is cylindrical. The first module 22 has a first cold-drawing hole 23, which is arranged along the axial direction of the first module 22, and the center line of the first cold-drawing hole 23 is collinear with the center line of the first module 22. The extension of the center line of the first cold-drawing hole 23 passes through the first material outlet 13, and the center line of the first cold-drawing hole 23 is collinear with the center line of the first receiving groove 11. The first material outlet 13 is located at the top of the side wall of the first receiving groove 11, and the tube to be cold-drawn can pass through the first material outlet 13 and the first cold-drawing hole 23. Preferably, the first cold-drawing hole 23 has a groove at one end for the input of the tube to be cold-drawn. The groove is generally funnel-shaped, meaning its diameter gradually decreases towards the second cold-drawing component 3. The end of the first cold-drawing hole 23 is located at the bottom of the groove. The groove guides the movement of the tube to be cold-drawn, allowing it to pass through the first cold-drawing hole 23. In this embodiment, the surface area reduction rate of the tube passing through the first cold-drawing hole 23 for cold drawing is 0%-20%, and the first cold-drawing hole 23 can straighten the tube to be cold-drawn.
[0026] The first cold-drawing assembly 2 includes at least two positioning blocks 21. The positioning blocks 21 abut against the sidewall of the first receiving groove 11, and are connected to the support platform 1 by bolts to fix their positions. A clamping space is formed between the two positioning blocks 21. The first module 22 is located within this clamping space, and its sidewall abuts against the sidewall of the positioning blocks 21, thus fixing its position. Each positioning block 21 has two protrusions on opposite sides, located at opposite ends of its sidewall. The first module 22 is positioned between these protrusions, allowing them to abut against the ends of the first module 22, preventing it from dislodging from the clamping space during cold drawing.
[0027] The first cold-drawing assembly 2 also includes a locking block 24, which is connected to the support platform 1. Specifically, the locking block 24 is connected to the bottom of the first receiving groove 11. The side wall of the first module 22 is provided with a slot. The first module 22 is positioned by locking the locking block 24 into the slot, and the first module 22 can also be kept stable.
[0028] The second cold-drawing assembly 3 is connected to the support platform 1 and located within the first receiving groove 11. The second cold-drawing assembly 3 includes a second module 31, on which a second cold-drawing hole 32 is provided. The diameter of the second cold-drawing hole 32 is smaller than the diameter of the first cold-drawing hole 23, and the extension line of the center line of the second cold-drawing hole 32 is collinear with the extension line of the center line of the first cold-drawing hole 23. The second cold-drawing assembly 3 has the same structure as the first cold-drawing assembly 2, except that the diameter of the cold-drawing hole is different, which will not be described in detail. In this embodiment, the area reduction rate of the tube to be cold-drawn through the second cold-drawing hole 32 is 20%-30%.
[0029] Depending on the required reduction rate for the cold-drawn tube, two or more cold-drawing assemblies can be set up.
[0030] The pipe cold drawing device also includes a base 4, which includes a second receiving groove 41, and a support platform 1 is located in the receiving groove. Multiple support columns 12 are connected to the bottom of the second receiving groove 41, and the tops of the support columns 12 are connected to the bottom of the support platform 1, thereby fixing the support platform 1. A second material passage 42 is provided on the opposite side of the second receiving groove 41, and the second material passage 42 corresponds to the position of the first material passage 13. The extension line of the center line of the first cold drawing hole 23 passes through the second material passage 42, so that the end of the pipe to be cold drawn passes sequentially through the second material passage 42, the first material passage 13, the first cold drawing hole 23, the second cold drawing hole 32, the first material passage 13, and the second material passage 42, thereby completing the cold drawing process of the pipe to be cold drawn.
[0031] Reference Figure 1 As shown, the support platform 1 is connected to a water inlet pipe 61, which passes through the bottom of the base 4. The outlet end of the water inlet pipe 61 is located at the bottom of the first receiving tank 11. The base 4 is connected to a water outlet pipe 51, the inlet end of which is located on the side wall of the second receiving tank 41. A water tank 5 and a water pump 6 are connected between the water inlet pipe 61 and the water outlet pipe 51. The outlet end of the water inlet pipe 61 is connected to the water tank 5, the input end of the water pump 6 is connected to the water tank 5 through a transition pipe, and the output end of the water pump 6 is connected to the inlet end of the water outlet pipe 51. The height of the outlet end of the water outlet pipe 51 is higher than the height of the inlet end of the water inlet pipe 61. The water tank 5 can be connected to an external refrigeration device to cool the cooling water inside the water tank 5. After the water pump 6 starts, cooling water enters the first receiving tank 11 through the inlet pipe 61. Once the water level rises to the first feed port 13, the cooling water enters the second receiving tank 41 through the first feed port 13. Finally, the cooling water enters the water tank 5 through the outlet pipe 51, thus completing the cooling water circulation. The cooling water can cool the tube to be cold-drawn, as well as the first cold-drawing assembly 2 and the second cold-drawing assembly 3, preventing damage to the tube, the first cold-drawing assembly 2, and the second cold-drawing assembly 3 due to excessive temperature.
[0032] In use, the tube to be cold-drawn is driven by an external drive device, causing the end of the tube to pass through the second feed port 42, the first feed port 13, the first cold-drawing hole 23, the second cold-drawing hole 32, the first feed port 13, and the second feed port 42 in sequence, thereby completing the cold drawing process of the tube to be cold-drawn. During the cold drawing process, the water pump 6 is kept running, and the cooling water enters the first receiving tank 11 through the water inlet pipe 61. After the water level rises to the first feed port 13, the cooling water enters the second receiving tank 41 through the first feed port 13. Finally, the cooling water enters the water tank 5 through the water outlet pipe 51, realizing the cooling water circulation.
[0033] This utility model discloses a pipe cold drawing device. By having the extension line of the center line of the second cold drawing hole 32 collinear with the extension line of the center line of the first cold drawing hole 23, the pipe to be cold drawn can move along the extension line of the center line of the first cold drawing hole 23 and pass through the first cold drawing hole 23 and the second cold drawing hole 32 in sequence. The diameter of the second cold drawing hole 32 is smaller than the diameter of the first cold drawing hole 23, so that the pipe to be cold drawn completes the straightening and small deformation of the pipe to be cold drawn through the first cold drawing hole 23, and completes the final cold drawing process through the second cold drawing hole 32. In this way, the force on the pipe is reduced by the two cold drawing processes, thereby reducing the probability of pipe breakage during the cold drawing process.
[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A pipe cold drawing device, characterized in that, include: Support platform; A first cold-drawing assembly is connected to the support platform. The first cold-drawing assembly includes a first module, and the first module is provided with a first cold-drawing hole. The second cold-drawing assembly is connected to the support platform. The second cold-drawing assembly includes a second module. The second module is provided with a second cold-drawing hole. The diameter of the second cold-drawing hole is smaller than the diameter of the first cold-drawing hole, and the extension line of the center line of the second cold-drawing hole is collinear with the extension line of the center line of the first cold-drawing hole.
2. The pipe cold drawing device according to claim 1, characterized in that: The support platform is provided with a first receiving groove, and the first cold drawing component and the second cold drawing component are both located in the first receiving groove. A first material passage is provided on the opposite side of the first receiving groove, and the extension line of the center line of the first cold drawing hole passes through the first material passage.
3. The pipe cold drawing device according to claim 2, characterized in that: The first cold-drawing assembly further includes at least two positioning blocks, which abut against the sidewall of the first receiving groove, and the first module is located between the two positioning blocks, with the first module abutting against the positioning blocks.
4. The pipe cold drawing device according to claim 2, characterized in that: It also includes a base, the base having a second receiving groove, and the support platform being located within the second receiving groove.
5. The pipe cold drawing device according to claim 4, characterized in that: The bottom of the second receiving groove is connected to a plurality of support columns, the ends of which are connected to the support platform.
6. The tube cold drawing device according to claim 4, characterized in that: A second material passage is provided on the opposite side of the second receiving groove, and the extension line of the center line of the first cold-drawn hole passes through the second material passage.
7. The pipe cold drawing device according to claim 4, characterized in that: The support platform is connected to a water inlet pipe, the end of which is located at the bottom of the first receiving tank. The base is connected to a water outlet pipe, the end of which is located at the side wall of the second receiving tank.
8. The pipe cold drawing device according to claim 7, characterized in that: A water tank and a water pump are connected between the inlet pipe and the outlet pipe. The inlet pipe is connected to the water tank, the input end of the water pump is connected to the water tank, and the output end of the water pump is connected to the outlet pipe.
9. The tube cold drawing device according to claim 7, characterized in that: The outlet end of the water pipe is higher than the inlet end of the water pipe.
10. The tube cold drawing device according to claim 1, characterized in that: The first cold-drawing assembly further includes a locking block, which is connected to the support platform. The side wall of the first module is provided with a locking groove, and the locking block engages with the locking groove.