High-precision long and thin hole steel pipe cold-drawing forming die

Abstract

The utility model provides a high-precision long and thin hole steel pipe cold-drawing forming die, which relates to the technical field of cold-drawing steel pipe dies, and comprises a die and a heat dissipation assembly, the heat dissipation assembly comprises heat dissipation fins fixed on the die, and the die is provided with a cooling liquid inlet. Cooling liquid flows into the spiral cooling groove from the cooling liquid inlet, due to the spiral path, the cooling liquid can make full contact with the mold and absorb a large amount of heat generated by working of the mold, finally the cooling liquid flows out of the cooling liquid outlet, meanwhile, the cooling fins increase the cooling area and assist in reducing the mold temperature, and mold abrasion and steel pipe quality reduction caused by high temperature are avoided; when the positioning assembly works, the bolt is rotated to drive the limiting block to rotate, so that the limiting block drives the connecting block, the rotating rod and the moving block to move, the supporting ring is accurately positioned and supports and guides the steel pipe, the stability of the cold drawing process of the steel pipe is ensured, and the product precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of cold-drawn steel pipe mold technology, and in particular to a high-precision cold-drawn forming mold for slender steel pipes. Background Technology

[0002] High-precision slender hole cold drawing forming dies for steel pipes are widely used in the manufacture of precision steel pipes, especially in aerospace, automotive, and machinery fields. Through the cold drawing process, steel pipes can achieve smaller wall thicknesses and higher dimensional accuracy. The dies are required to have good wear resistance, strength, and processing accuracy to ensure that the steel pipes maintain shape consistency and improve surface quality during the production process.

[0003] However, in practical use, the following shortcomings still exist. For example, existing high-precision slender hole steel pipe cold drawing forming dies cannot achieve the positioning function of the steel pipe. Moreover, when the die temperature is reduced during cold drawing, the steel pipe may be deviated or shaken when entering the die due to the inability of the die to accurately position the steel pipe, resulting in uneven wall thickness and affecting product quality. The inability of the die to position the steel pipe makes it difficult to accurately control the deformation of the steel pipe during the cold drawing process, which leads to a decrease in the dimensional accuracy of the outer diameter, inner diameter, etc. The inability of the die to position the steel pipe may also lead to increased friction between the steel pipe and the die, damaging the surface of the steel pipe and causing defects such as scratches and cracks. At low temperatures, the viscosity of the lubricant decreases and its fluidity increases, which is conducive to the formation of a continuous and uniform lubricating film and improves the lubrication effect. Lowering the die temperature helps to maintain the dimensional stability of the die and reduce dimensional changes caused by thermal expansion, thereby improving the dimensional accuracy of the product.

[0004] Therefore, this utility model proposes a high-precision cold drawing forming mold for slender steel pipes to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a high-precision cold-drawing forming mold for slender steel pipes.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a high-precision cold-drawing forming mold for slender steel pipes, comprising the mold and further comprising:

[0007] A heat dissipation assembly includes heat dissipation fins fixed on a mold, a coolant inlet on the mold, a spiral cooling groove inside the mold, and a coolant outlet on the side of the mold away from the coolant inlet. Both the coolant inlet and the coolant outlet are located on the spiral cooling groove.

[0008] The positioning assembly includes a support frame fixed on the mold, a bolt threadedly connected to the support frame, a limit block provided on the bolt, a connecting block slidably connected to the limit block, a rotating rod rotatably connected to the connecting block, a moving block rotatably connected to the rotating rod, and a support ring fixed on the moving block.

[0009] Furthermore, a lubricant inlet is provided on the top of the mold.

[0010] The beneficial effects of adopting the above-mentioned further solution are: the lubricant inlet is located at the top of the mold and is used to deliver lubricant to the cold drawing forming zone. During the cold drawing process of the steel pipe, the lubricant is injected into the mold through the inlet to form a uniform lubricating film, which reduces the frictional resistance between the steel pipe and the mold, prevents surface scratches, and improves the forming accuracy and surface finish.

[0011] Furthermore, a guide groove is provided on the side of the mold near the lubricant inlet.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the guide groove is located at the lubricant inlet and is used to guide the lubricant to be distributed to the inner wall of the mold, ensuring that the steel pipe is effectively lubricated throughout the cold drawing process, reducing frictional heat and material adhesion, and improving the mold life and steel pipe surface quality.

[0013] Furthermore, a limiting groove is provided on the support frame.

[0014] The beneficial effects of adopting the above-mentioned further solution are: the limiting groove is used to constrain the movement trajectory of the moving block, ensuring that it slides in the predetermined direction and avoids deviation or shaking. The moving block moves smoothly in the limiting groove, driving the support ring to accurately adjust its position, so that the steel pipe is always in the best alignment state.

[0015] Furthermore, the movable block is slidably connected within the limiting groove.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the moving block slides smoothly on the support frame through the guiding action of the limiting groove.

[0017] Furthermore, the support ring is provided with ball bearings.

[0018] The beneficial effects of adopting the above-mentioned further solution are: the ball bearings are installed inside the support ring and contact the outer wall of the steel pipe to form rolling friction support. During the cold drawing process, the steel pipe moves smoothly under the guidance of the ball bearings. Compared with traditional sliding friction, the resistance is greatly reduced and surface scratches are reduced.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0020] In this invention, during the cold drawing process, the coolant flows into the spiral cooling tank from the coolant inlet. Due to its spiral path, the coolant can fully contact the mold, absorbing a large amount of heat generated by the mold's operation, and finally flows out from the coolant outlet. At the same time, the heat dissipation fins increase the heat dissipation area, helping to reduce the mold temperature and preventing mold wear and steel pipe quality degradation caused by high temperature. When the positioning component is working, the rotating bolt drives the limit block to rotate, which in turn drives the connecting block, rotating rod, and moving block to move, so that the support ring is accurately positioned. The support ring provides support and guidance for the steel pipe, ensuring the stability of the cold drawing process and improving product accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a high-precision slender hole steel pipe cold drawing forming mold of this utility model;

[0022] Figure 2 This is a schematic diagram of the heat dissipation component structure of a high-precision slender hole steel pipe cold drawing forming mold of this utility model;

[0023] Figure 3 This is a cross-sectional view of the heat dissipation component structure of a high-precision slender hole steel pipe cold drawing forming mold of the present invention.

[0024] Figure 4 This is a schematic diagram of the positioning component structure of a high-precision slender hole steel pipe cold drawing forming mold of this utility model;

[0025] Figure 5 This is a structural breakdown diagram of the positioning component of a high-precision, slender-hole steel pipe cold-drawing forming mold according to this utility model.

[0026] Figure label:

[0027] 1. Mold;

[0028] 2. Heat dissipation components; 21. Heat dissipation fins; 22. Coolant inlet; 23. Spiral cooling groove; 24. Coolant outlet; 25. Lubricant inlet; 26. Guide channel;

[0029] 3. Positioning component; 31. Support frame; 32. Bolt; 33. Limiting block; 34. Connecting block; 35. Rotating rod; 36. Moving block; 37. Limiting groove; 38. Support ring; 39. Ball bearing. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1-5 As shown, this embodiment provides a technical solution: a high-precision cold-drawing forming mold for slender steel pipes, including mold 1, and further including:

[0032] The heat dissipation component 2 includes heat dissipation fins 21 fixed on the mold 1, a coolant inlet 22 is provided on the mold 1, a spiral cooling groove 23 is provided inside the mold 1, and a coolant outlet 24 is provided on the side of the mold 1 away from the coolant inlet 22. Both the coolant inlet 22 and the coolant outlet 24 are provided on the spiral cooling groove 23.

[0033] Positioning component 3 includes a support frame 31 fixed to the mold 1. Bolts 32 are threaded onto the support frame 31. A limit block 33 is provided on the bolt 32. A connecting block 34 is slidably connected to the limit block 33. A rotating rod 35 is rotatably connected to the connecting block 34. A moving block 36 is rotatably connected to the rotating rod 35. A support ring 38 is fixed on the moving block 36. During the cold drawing process, coolant flows from the coolant inlet 22 into the spiral cooling tank 23. Due to its spiral path, the coolant can fully contact the mold 1 and absorb... The large amount of heat generated by the mold 1 during operation is finally discharged from the coolant outlet 24. At the same time, the heat dissipation fins 21 increase the heat dissipation area and help reduce the temperature of the mold 1, avoiding wear of the mold 1 and deterioration of the steel pipe due to high temperature. When the positioning component 3 is working, the rotating bolt 32 drives the limit block 33 to rotate, which in turn drives the connecting block 34, the rotating rod 35 and the moving block 36 to move, so that the support ring 38 is accurately positioned. The support ring 38 plays a supporting and guiding role for the steel pipe, ensuring the stability of the cold drawing process of the steel pipe and improving the product accuracy.

[0034] The above solutions still have the problem of not being able to improve forming accuracy and surface finish during the cold drawing process of steel pipes, such as... Figures 1-3As shown: The top of the mold 1 is provided with a lubricating fluid inlet 25. The lubricating fluid inlet 25 is located at the top of the mold 1 and is used to deliver lubricating fluid to the cold drawing forming area. During the cold drawing process of the steel pipe, the lubricating fluid is injected into the interior of the mold 1 through the inlet to form a uniform lubricating film, which reduces the frictional resistance between the steel pipe and the mold 1, prevents surface scratches, and improves the forming accuracy and surface finish. A guide groove 26 is provided on the side of the mold 1 near the lubricating fluid inlet 25. The guide groove 26 is located at the lubricating fluid inlet 25 and is used to guide the lubricating fluid to be distributed to the inner wall of the mold 1, ensuring that the steel pipe is effectively lubricated throughout the cold drawing process, reducing frictional heat and material adhesion, and improving the life of the mold 1 and the surface quality of the steel pipe.

[0035] like Figure 1 as well as Figure 4 As shown, a limiting groove 37 is provided on the support frame 31. The limiting groove 37 is used to constrain the movement trajectory of the moving block 36, ensuring that it slides in a predetermined direction and avoiding deviation or shaking. The moving block 36 moves smoothly in the limiting groove 37, driving the support ring 38 to precisely adjust its position, so that the steel pipe is always in the best alignment state. The moving block 36 is slidably connected in the limiting groove 37. The moving block 36 slides smoothly on the support frame 31 through the guiding effect of the limiting groove 37. The support ring 38 is provided with ball bearings 39. The ball bearings 39 are installed in the support ring 38 and contact the outer wall of the steel pipe to form rolling friction support. During the cold drawing process, the steel pipe moves smoothly under the guidance of the ball bearings 39. Compared with traditional sliding friction, the resistance is greatly reduced and surface scratches are reduced.

[0036] Working principle:

[0037] like Figures 1-5As shown, during the cold drawing and forming of high-precision slender-hole steel pipes, the steel pipe is first positioned. Rotating bolt 32 causes the limiting block 33 to rotate, which in turn moves the connecting block 34, rotating rod 35, and moving block 36. This allows the moving block 36 to slide smoothly within the limiting groove 37, which provides precise guidance and ensures stable movement. Ultimately, the support ring 38 fixed on the moving block 36 reaches the predetermined position. The balls 39 on the support ring 38 contact the outer wall of the steel pipe, converting sliding friction into rolling friction, significantly reducing frictional resistance and ensuring the steel pipe remains stable during cold drawing, improving straightness and precision. During cold drawing, coolant is injected into the spiral cooling tank 23 from the coolant inlet 22. The spiral channel increases the interaction between the coolant and the mold 1. The contact area and contact time allow the coolant to fully absorb the heat generated by the friction between the mold 1 and the steel pipe, and then flow out from the coolant outlet 24 to complete the heat dissipation cycle. At the same time, the heat dissipation fins 21 adhere to the surface of the mold 1, further increasing the heat dissipation area, accelerating heat dissipation, effectively controlling the temperature of the mold 1, and avoiding wear of the mold 1 and deterioration of the steel pipe due to high temperature. The lubricant is injected from the lubricant inlet 25 at the top of the mold 1, and guided by the guide groove 26, flows into the contact area between the inner wall of the mold 1 and the steel pipe, forming a continuous and uniform lubricating film. This lubricating film effectively reduces the friction between the steel pipe and the mold 1, reduces the cold drawing force, prevents scratches on the surface of the steel pipe, reduces wear on the mold 1, extends the service life of the mold 1, and ensures the surface quality and smoothness of the steel pipe, so that the cold drawing and forming of high-precision slender hole steel pipes can be carried out smoothly.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-precision cold-drawing die for forming an elongated hole in a steel pipe, comprising a die (1), characterized in that, Also include: The heat dissipation assembly (2) includes heat dissipation fins (21) fixed on the mold (1), the mold (1) is provided with cooling liquid inlet (22), the mold (1) is provided with spiral cooling groove (23), the mold (1) is provided with cooling liquid outlet (24) away from the cooling liquid inlet (22) side, the cooling liquid inlet (22) and cooling liquid outlet (24) are arranged on the spiral cooling groove (23); The positioning assembly (3) includes a support frame (31) fixed on the mold (1), the support frame (31) is threadedly connected with a bolt (32), the bolt (32) is provided with a limiting block (33), the limiting block (33) is slidably connected with a connecting block (34), the connecting block (34) is rotatably connected with a rotating rod (35), the rotating rod (35) is rotatably connected with a moving block (36), and the moving block (36) is fixed with a support ring (38).

2. The high-precision cold-drawing forming die for a slender hole steel pipe according to claim 1, characterized in that: The top of the mold (1) is provided with a lubricating liquid inlet (25).

3. The high-precision cold-drawing forming die for a slender hole steel pipe according to claim 2, characterized in that: The mold (1) is provided with a flow guide groove (26) near the lubricating liquid inlet (25).

4. The high-precision cold-drawing forming die for a slender hole steel pipe according to claim 1, characterized in that: The support frame (31) is provided with a limiting groove (37).

5. The high-precision cold-drawing forming die for a slender hole steel pipe according to claim 4, characterized in that: The moving block (36) is slidably connected in the limiting groove (37).

6. The high-precision cold-drawing forming die for a slender hole steel pipe according to claim 1, characterized in that: The support ring (38) is provided with a ball (39).

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