Cold-drawing die for producing galvanized square tube

Abstract

The utility model relates to the technical field of cold-drawing dies, and discloses a cold-drawing die for producing a galvanized square tube, which comprises a die body mounted on a base, two symmetrically arranged support plates are fixedly connected above the base, the tops of the two support plates are respectively provided with a V-shaped mounting port, and the V-shaped mounting ports are arranged on the die body. Mounting shafts are fixedly connected to the middle positions of the two sides of the mold body, the two mounting shafts are rotationally connected with the two V-shaped mounting openings correspondingly, and reinforcing assemblies are connected into the two V-shaped mounting openings correspondingly. According to the cold-drawing die for producing the galvanized square tube, the V-shaped mounting openings are formed in the tops of the two supporting plates, when the die is mounted, mounting shafts on the two sides of the die pass through the open openings in the tops of the V-shaped mounting openings, the die can be mounted without precise positioning, and meanwhile the mounting shafts can be fixed under the action of gravity; and the cold-drawing die can automatically slide to the bottom of the V-shaped mounting opening, so that rapid positioning and mounting of the cold-drawing die are completed, and the die replacement efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of cold drawing die technology, specifically a cold drawing die for producing galvanized square tubes. Background Technology

[0002] Cold drawing is a metal forming process that reduces the diameter or changes the cross-sectional shape of a material by stretching it without heating, thereby improving the material's mechanical properties and surface finish. Galvanized square tubes are typically produced using cold drawing. While processing the galvanized tube into a square tube, a die is used to scrape away any impurities that may be present on the outer surface of the tube, resulting in a smoother outer surface.

[0003] The patent with publication number CN220426329U discloses a cold drawing machine for seamless steel pipes, including a cold drawing base. A first cold drawing table is provided at the front of the top of the cold drawing base, and a second cold drawing table is provided at the rear of the top of the cold drawing base. Both the first and second cold drawing tables have through holes on their sides. Both the first and second cold drawing tables have mounting holes in their middle. A mold plate is provided between the first and second cold drawing tables. The mold plate has several mold holes. Several positioning blocks are provided on the side wall of the mold plate. Each positioning block has a positioning hole in its middle. A drive shaft is provided in the middle of the mold plate. A turntable is provided at the front end of the drive shaft. Fixing blocks are provided on the side wall of both the first and second cold drawing tables. Bolts are installed in the middle of the fixing blocks. Nuts are installed on the bolts. The drive shaft is installed inside the mounting holes. The diameters of the several mold holes are different, making it simple and convenient to change the mold holes and improving the processing efficiency of seamless steel pipes.

[0004] However, the cold drawing machines described above still have the following problems: due to the varying sizes and shapes of the products, the cold drawing dies need to be frequently changed according to the specific requirements of the product during the cold drawing process. However, these dies are usually suspended on the cold drawing table, making it difficult to quickly and accurately align them during replacement, which in turn affects the efficiency of changing dies of different shapes and makes the whole process relatively slow. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cold drawing die for producing galvanized square tubes, thereby improving the efficiency of cold drawing die replacement.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cold drawing die for producing galvanized square tubes, comprising a die body mounted on a base, two symmetrically arranged support plates fixedly connected above the base, each support plate having a V-shaped mounting opening at its top, and mounting shafts fixedly connected to the middle positions of both sides of the die body, the two mounting shafts being rotatably connected to the two V-shaped mounting openings respectively, and reinforcing components connected inside the two V-shaped mounting openings.

[0007] Furthermore, the reinforcement component includes a reinforcement plate and an expansion joint. One side of the V-shaped mounting opening has an expansion groove, and the other side of the V-shaped mounting opening has a mating opening. The expansion joint is embedded in the expansion groove on the side away from the mating opening. The expansion end of the expansion joint is fixedly connected to the reinforcement plate. The reinforcement plate is slidably connected to the expansion groove. The end of the reinforcement plate away from the expansion joint is slidably connected to the mating opening. The reinforcement plate abuts against the side of the mounting shaft away from the V-shaped mounting opening.

[0008] Furthermore, the side of the mold body is provided with several cold-drawn openings, and the side of both support plates is provided with material outlets that match the cold-drawn openings.

[0009] Furthermore, the two support plates both have an arc-shaped edge structure on their adjacent top sides.

[0010] Furthermore, a limiting ring is fitted and fixedly connected to the outer side of the mold body. The side of the limiting ring is provided with limiting holes that match several cold-drawn openings. Positioning insertion holes are provided through the outer walls of both support plates. Positioning rods are connected between the two positioning insertion holes and are slidably connected to the limiting holes.

[0011] Furthermore, a sleeve communicating with a positioning hole is fixedly connected to the outer side of one of the support plates. An operating groove is opened through one side of the sleeve. The outer wall of the positioning rod is slidably connected to the inner wall of the sleeve. An operating rod is fixedly connected to the side wall of the positioning rod near the end of the sleeve. The operating rod is slidably connected to the operating groove.

[0012] Furthermore, a spring is fixedly connected to one end of the positioning rod near the operating rod, and the other end of the spring is fixedly connected to the other end of the sleeve.

[0013] Furthermore, the end of the positioning rod away from the sleeve is provided with a tapered head.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This type of cold-drawing die for producing galvanized square tubes features a V-shaped mounting opening on the top of two support plates. During die installation, the mounting shafts on both sides of the die are placed through the open top of the V-shaped mounting opening, allowing for die installation without precise positioning. Simultaneously, the mounting shafts automatically slide down to the bottom of the V-shaped mounting opening under gravity, enabling rapid positioning and installation of the cold-drawing die and improving die replacement efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance and connection structure of this utility model;

[0017] Figure 2 This is an exploded cross-sectional view of the support plate structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure of this utility model from another angle;

[0019] Figure 4 For based on Figure 3 A schematic diagram of the cross-sectional structure of the support plate at the corner;

[0020] Figure 5 For based on Figure 4 A schematic diagram of the positioning plug connection structure.

[0021] In the diagram: 1. Base; 2. Mold body; 3. Support plate; 4. Mounting shaft; 5. Reinforcing plate; 6. Expansion joint; 7. Limiting ring; 8. Positioning rod; 9. Sleeve; 10. Operating rod; 11. Spring; 201. Cold drawing port; 301. V-shaped mounting port; 302. Expansion groove; 303. Mating port; 304. Material port; 305. Positioning hole; 701. Limiting hole; 901. Operating groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1 to 5 A cold-drawing die for producing galvanized square tubes includes a die body 2 mounted on a base 1. Two symmetrically arranged support plates 3 are fixedly connected above the base 1. The top of each support plate 3 is provided with a V-shaped mounting port 301. Mounting shafts 4 are fixedly connected to the middle of both sides of the die body 2. The two mounting shafts 4 are rotatably connected to the two V-shaped mounting ports 301 respectively. Reinforcing components are connected inside each of the two V-shaped mounting ports 301.

[0024] like Figures 1 to 5 As shown, the cold drawing die for producing galvanized square tubes in this utility model is structurally similar to existing cold drawing dies for producing galvanized square tubes, such as the seamless steel pipe cold drawing machine disclosed in patent publication number CN220426329U. The main improvement of this utility model lies in improving the efficiency of cold drawing die replacement, such as... Figures 1 to 5As shown, in the present invention, the cold drawing die for producing galvanized square tubes is used by lifting tools to lift the mounting shafts 4 on both sides of the die body 2, which are originally installed on the two support plates 3. Then, the mounting shafts 4 on both sides of the die body 2 that need to be replaced are lifted and placed from above the V-shaped mounting opening 301 at the top of the support plate 3. The open V-shaped mounting opening 301 at the top can be used to place the die body 2 and the mounting shafts 4 on both sides without precise positioning. Under the action of gravity, the mounting shafts 4 can automatically slide down to the bottom of the V-shaped mounting opening 301, thereby automatically and quickly and accurately installing the mounting shafts 4 on the two support plates 3, realizing the rapid replacement and installation of the cold drawing die, and improving the replacement efficiency of the cold drawing die during the processing of galvanized square tubes.

[0025] like Figures 1 to 3 As shown, the reinforcement assembly includes a reinforcement plate 5 and an expansion joint 6. A telescopic groove 302 is provided on one side of the V-shaped mounting port 301, and a mating port 303 is provided on the other side of the V-shaped mounting port 301. The expansion joint 6 is embedded in the side of the telescopic groove 302 away from the mating port 303. The telescopic end of the expansion joint 6 is fixedly connected to the reinforcement plate 5. The reinforcement plate 5 is slidably connected to the telescopic groove 302. The end of the reinforcement plate 5 away from the expansion joint 6 is slidably connected to the mating port 303. The reinforcement plate 5 abuts against the side of the mounting shaft 4 away from the V-shaped mounting port 301. After the mounting shafts 4 on both sides of the mold body 2 are installed into the V-shaped mounting openings 301, the reinforcing plate 5 in the expansion groove 302 is pushed outward by the expansion joint 6, so that the reinforcing plate 5 is inserted into the mating opening 303 on the other side, and a part is left in the expansion groove 302. This makes the reinforcing plate 5 form a closed structure above the V-shaped mounting opening 301, blocking the mounting shaft 4 at the bottom of the V-shaped mounting opening 301. This ensures that the mounting shaft 4 will not shake at the bottom of the V-shaped mounting opening 301 during cold drawing, thus improving the stability of the mold body 2 between the two support plates 3.

[0026] like Figures 1 to 4 As shown, the mold body 2 has several cold drawing openings 201 through its side, and the two support plates 3 each have material openings 304 through their sides that match the cold drawing openings 201. When starting the cold drawing process, the pipe is passed through the material opening 304 of one of the support plates 3 and inserted into the corresponding cold drawing opening 201, and then pulled out from the material opening 304 of the other support plate 3. Multiple cold drawing openings 201 can accommodate pipes of different diameters, reducing the frequency of mold body 2 replacements and improving cold drawing efficiency. The size of the material openings 304 on the side of the support plate 3 must not be smaller than the size of the largest cold drawing opening 201 on the mold body 2.

[0027] like Figures 1 to 4As shown, the top adjacent sides of the two support plates 3 are both arc-shaped. By setting the top adjacent sides of the two support plates 3 as arc-shaped edges, the mold body 2 can be inserted more smoothly between the two support plates 3 when it is installed.

[0028] like Figures 1 to 5 As shown, a limiting ring 7 is fitted and fixedly connected to the outer side of the mold body 2. The side of the limiting ring 7 has limiting holes 701 that match several cold-drawn openings 201. Positioning insertion holes 305 are opened through the outer walls of both support plates 3. A positioning rod 8 is connected between the two positioning insertion holes 305, and the positioning rod 8 is slidably connected to the limiting hole 701. When aligning one of the cold-drawn openings 201 of the mold body 2 with the material outlet 304, the positioning rod 8 can be inserted from the positioning insertion hole 305 on the side of the support plate 3 and further inserted into the limiting hole 701 of the inner limiting ring 7. Finally, the positioning rod 8 is inserted into the positioning insertion hole 305 on the side of the other support plate 3, thus fixing the position of the corresponding limiting hole 701 and the two positioning holes 305, ensuring that the cold-drawn opening 201 will not be misaligned after being aligned with the material outlet 304.

[0029] like Figures 1 to 5 As shown, a sleeve 9 communicating with a positioning insertion hole 305 is fixedly connected to the outer side of one of the support plates 3. An operating groove 901 is provided through one side of the sleeve 9. The outer wall of the positioning rod 8 is slidably connected to the inner wall of the sleeve 9. An operating rod 10 is fixedly connected to the side wall of the positioning rod 8 near the end of the sleeve 9, and the operating rod 10 is slidably connected to the operating groove 901. When the positioning rod 8 is pulled out of the limiting hole 701, the operating rod 10 is pulled outward in the operating groove 901 to pull the positioning rod 8 into the sleeve 9, preventing the positioning rod 8 from falling and improving the stability of the positioning rod 8 in use.

[0030] like Figure 4 and Figure 5 As shown, a spring 11 is fixedly connected to one end of the positioning rod 8 near the operating rod 10, and the other end of the spring 11 is fixedly connected to the other end of the sleeve 9. When it is necessary to change the cold-drawn opening 201, the positioning rod 8 is retracted into the sleeve 9, and the mold body 2 is rotated. Then, the operating rod 10 is released, and the spring 11 pushes the positioning rod 8 outward and against the outside of the limiting ring 7. When the next limiting hole 701 moves to the position of the positioning rod 8, the positioning rod 8 can be automatically inserted to complete the positioning of the mold body 2. At this time, the cold-drawn opening 201 can be aligned with the material outlet 304. Switching the cold-drawn opening 201 is more convenient. The operating groove 901 can also be provided with vertical slots at both ends to facilitate the rotation of the operating rod 10 and its insertion into the vertical slots. This prevents the spring 11 from causing the positioning rod 8 to pop outward or retract inward, and can fix the position of the positioning rod 8 (not shown in the figure, similar to the existing pin structure).

[0031] like Figures 1 to 5 As shown, the end of the positioning rod 8 furthest from the sleeve 9 is provided with a tapered head. The tapered head structure at the end of the positioning rod 8 allows the positioning rod 8 to be inserted into the limiting hole 701 more smoothly.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A cold-drawing die for producing galvanized square tubes, comprising a die body (2) mounted on a base (1), characterized in that: Two symmetrically arranged support plates (3) are fixedly connected above the base (1). The top of the two support plates (3) is provided with a V-shaped mounting port (301). The middle positions of both sides of the mold body (2) are fixedly connected with mounting shafts (4). The two mounting shafts (4) are rotatably connected to the two V-shaped mounting ports (301) respectively. Reinforcing components are connected inside the two V-shaped mounting ports (301).

2. The cold drawing die for producing galvanized square tubes according to claim 1, characterized in that: The reinforcement assembly includes a reinforcement plate (5) and an expansion joint (6). An expansion groove (302) is provided on one side of the V-shaped mounting port (301), and a mating port (303) is provided on the other side of the V-shaped mounting port (301). The expansion joint (6) is embedded in the expansion groove (302) on the side away from the mating port (303). The expansion end of the expansion joint (6) is fixedly connected to the reinforcement plate (5). The reinforcement plate (5) is slidably connected to the expansion groove (302). The end of the reinforcement plate (5) away from the expansion joint (6) is slidably connected to the mating port (303). The reinforcement plate (5) abuts against the side of the mounting shaft (4) away from the V-shaped mounting port (301).

3. A cold-drawing die for producing galvanized square tubes according to claim 1 or 2, characterized in that: The mold body (2) has several cold-drawn openings (201) through its side, and the two support plates (3) have material openings (304) through their sides that match the cold-drawn openings (201).

4. A cold-drawing die for producing galvanized square tubes according to claim 1 or 2, characterized in that: Both of the support plates (3) have an arc edge structure on the adjacent side of their top.

5. A cold drawing die for producing galvanized square tubes according to claim 3, characterized in that: A limiting ring (7) is fitted and fixedly connected to the outer side of the mold body (2). The side of the limiting ring (7) is provided with limiting holes (701) that match several cold-drawn openings (201). The outer walls of the two support plates (3) are provided with positioning insertion holes (305). A positioning rod (8) is connected between the two positioning insertion holes (305). The positioning rod (8) is slidably connected to the limiting hole (701).

6. A cold-drawing die for producing galvanized square tubes according to claim 5, characterized in that: One of the support plates (3) is fixedly connected to a sleeve (9) that communicates with a positioning hole (305). An operating groove (901) is opened through one side of the sleeve (9). The outer wall of the positioning rod (8) is slidably connected to the inner wall of the sleeve (9). An operating rod (10) is fixedly connected to the side wall of the positioning rod (8) near the end of the sleeve (9). The operating rod (10) is slidably connected to the operating groove (901).

7. A cold-drawing die for producing galvanized square tubes according to claim 6, characterized in that: The positioning rod (8) is fixedly connected to a spring (11) at one end near the operating rod (10), and the other end of the spring (11) is fixedly connected to the other end of the sleeve (9).

8. A cold-drawing die for producing galvanized square tubes according to claim 6 or 7, characterized in that: The positioning rod (8) has a tapered head at the end away from the sleeve (9).

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