A high-efficiency and high-precision drawing equipment for seamless steel pipe machining
By designing a friction-type limiting component, the problem of deformation of the thin-walled part of the seamless steel pipe during clamping is solved, achieving efficient and high-precision steel pipe drawing and ensuring the dimensional accuracy and surface quality of the steel pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG DINGSHANG STAINLESS STEEL CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-09
AI Technical Summary
In existing seamless steel pipe processing, thin-walled steel pipes are prone to deformation when clamped and limited, resulting in reduced accuracy.
The friction-type limiting assembly includes a telescopic frame, a threaded rod, a slider, a keel frame, and a limiting frame. The movement of the slider and the keel frame is driven by the threaded rod, so that the limiting frame clamps the inner wall of the steel pipe in multiple directions synchronously, thereby increasing the friction and preventing deformation.
This improves the processing accuracy of seamless steel pipes, avoids deformation of thin-walled steel pipes due to force during clamping, and ensures efficient and high-precision drawing effect.
Smart Images
Figure CN224333112U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel pipe processing technology, specifically to a high-efficiency and high-precision drawing device for seamless steel pipe processing. Background Technology
[0002] The drawing process in seamless steel pipe processing is a key cold working method, aiming to improve the dimensional accuracy, surface quality, and mechanical properties of steel pipes through multi-pass plastic deformation. Its core process includes pretreatment, multi-pass drawing, and post-treatment. First, the billet is annealed to soften the structure, then pickled (with sulfuric acid or hydrochloric acid) to remove the oxide scale, and then phosphated, saponified, or lubricated to reduce friction. Subsequently, a hard alloy outer die (such as YG8) and a hard chrome-plated inner die are used on a cold drawing machine. During drawing, the steel pipe needs to be clamped and limited. A common limiting method is to place two clamps on the left and right sides of the stainless steel pipe, with the two clamps staggered, and then clamp the pipe against each other. This method can indeed provide high friction to limit the steel pipe, but some steel pipes have thin walls, and they are prone to deformation when subjected to mutual force, which reduces the accuracy of the steel pipe. Utility Model Content
[0003] The purpose of this invention is to provide a high-efficiency and high-precision drawing device for seamless steel pipe processing to solve the above problems.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency and high-precision drawing device for seamless steel pipe processing, comprising;
[0005] The seamless steel pipe body has a friction-type limiting component inside, which includes a telescopic frame, a threaded rod, a slider, a keel frame A, a keel frame B, and a limiting frame.
[0006] The telescopic frame has a hollow groove inside, and the slider is embedded in the hollow groove. There are multiple connecting parts B, and multiple connecting parts B are fixedly connected to the outside of the slider. The outside of the slider has multiple integrally fixed connecting parts A. One end of the connecting part A is hinged to the keel frame B. The bottom two sides of the limiting frame are respectively attached to the keel frame A and the keel frame B. The keel frame A, the keel frame B and the limiting frame are connected by positioning pins. The limiting frame is hinged to the keel frame A and the keel frame B. The outside of the limiting frame is attached to the inner wall of the seamless steel pipe body.
[0007] The threaded rod passes through the telescopic frame and the slider.
[0008] Preferably, the hollow groove has a hexagonal cross-section, the slider has a hexagonal shape, the outer side of the slider fits into the hollow groove, and the slider can slide directionally inside the hollow groove.
[0009] Preferably, the telescopic frame is provided with multiple guide rails, and the connecting part B passes through the guide rails and is slidably connected to the telescopic frame. The connecting part B is tightly fitted with the guide rails so that it can slide in a directional manner.
[0010] Preferably, one end of the telescopic frame has an integrally fixed positioning tube, and the threaded rod is rotatably connected to the positioning tube. The middle of the slider has a threaded hole, and the threaded rod is threadedly connected to the slider. Rotating the threaded rod can drive the slider to move laterally on the threaded rod, thereby driving one end of the keel frame A to move through the connecting part B, so that the angle between the keel frame A and the keel frame B is reduced, so that the limiting frame is clamped against the inner wall of the seamless steel pipe body. Multiple limiting frames are simultaneously clamped against the inner wall of the seamless steel pipe body in multiple directions, thereby limiting and fixing the seamless steel pipe body.
[0011] Preferably, the outer side of the limiting frame is arc-shaped, which improves the fit with the seamless steel pipe body and increases the friction area. In addition, the outer wall of the limiting frame has multiple protrusions, which further improves the friction with the inner wall of the seamless steel pipe body and makes it less prone to slipping.
[0012] Preferably, one end of the threaded rod has an integrally fixed drive rod, which is hexagonal in shape. The threaded rod can be connected to a motor through the drive rod, and the motor drives the threaded rod to increase its torque, thereby increasing the friction between the limit frame and the inner wall of the seamless steel pipe body.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This structure uses a friction-type limiting component inserted into the inner wall of the steel pipe and expanding outward to clamp the seamless steel pipe body synchronously from multiple directions. The structure of the limiting frame fits the inner wall of the seamless steel pipe body better, thereby avoiding the deformation caused by the stress on the seamless steel pipe body, which would lead to a decrease in accuracy. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0017] Figure 3 This is a schematic diagram of the exploded structure of the friction-type limiting component of this utility model.
[0018] In the diagram: 100, seamless steel pipe body; 200, telescopic frame; 201, positioning tube; 202, guide rail; 203, connecting part A; 300, threaded rod; 301, drive rod; 400, slider; 401, connecting part B; 500, keel frame A; 501, keel frame B; 502, limit frame. Detailed Implementation
[0019] 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.
[0020] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] Please see Figure 1-3 This utility model provides a technical solution: a high-efficiency and high-precision drawing device for seamless steel pipe processing, comprising;
[0023] The seamless steel pipe body 100 has a friction-type limiting component inside, which includes a telescopic frame 200, a threaded rod 300, a slider 400, a keel frame A500, a keel frame B501, and a limiting frame 502.
[0024] The telescopic frame 200 has a hollow groove inside, and the slider 400 is embedded inside the hollow groove. There are multiple connecting parts B401, and multiple connecting parts B401 are fixedly connected to the outside of the slider 400. The outside of 200 has multiple integrally fixed connecting parts A203. One end of the connecting part A203 is hinged to the keel frame B501, and one end of the connecting part B401 is hinged to the keel frame A500. The bottom two sides of the limiting frame 502 are respectively attached to the keel frame A500 and the keel frame B501. Positioning pins pass through the keel frame A500, the keel frame B501 and the limiting frame 502. The limiting frame 502 is hinged to the keel frame A500 and the keel frame B501. The outside of the limiting frame 502 is attached to the inner wall of the seamless steel pipe body 100.
[0025] The threaded rod 300 passes through the telescopic frame 200 and the slider 400.
[0026] Furthermore, the cross-section of the hollow groove is hexagonal, the slider 400 is hexagonal, the outer side of the slider 400 fits into the hollow groove, and the slider 400 can slide directionally inside the hollow groove.
[0027] Furthermore, the telescopic frame 200 is provided with multiple guide rails 202, and the connecting part B401 passes through the guide rails 202 and is slidably connected to the telescopic frame 200. The connecting part B401 is tightly fitted with the guide rails 202 so that it can slide in a directional manner.
[0028] Furthermore, one end of the telescopic frame 200 has an integrally fixed positioning tube 201, and the threaded rod 300 is rotatably connected to the positioning tube 201. The middle part of the slider 400 has a threaded hole, and the threaded rod 300 is threadedly connected to the slider 400. Rotating the threaded rod 300 can drive the slider 400 to move laterally on the threaded rod 300, thereby driving one end of the keel frame A500 to move through the connecting part B401, so that the angle between the keel frame A500 and the keel frame B501 is reduced, so that the limiting frame 502 is pressed against the inner wall of the seamless steel pipe body 100 and clamped. Multiple limiting frames 502 are simultaneously pressed against the inner wall of the seamless steel pipe body 100 for multi-directional clamping, thereby limiting and fixing the seamless steel pipe body 100.
[0029] Furthermore, the outer side of the limiting frame 502 is arc-shaped, which improves the fit with the seamless steel pipe body 100 and increases the friction area. The outer wall of the limiting frame 502 has multiple protrusions, which further increases the friction with the inner wall of the seamless steel pipe body 100 and makes it less prone to slipping.
[0030] Furthermore, one end of the threaded rod 300 has an integrally fixed drive rod 301. The drive rod 301 is hexagonal in shape. The threaded rod 300 can be connected to a motor through the drive rod 301. The motor drives the threaded rod 300 to increase its torque, thereby increasing the friction between the limit frame 502 and the inner wall of the seamless steel pipe body 100.
[0031] Working principle: In use, the friction-type limiting component is inserted into the inner wall of the seamless steel pipe body 100 to be pulled. The drive motor connects to the drive rod 301 to drive the threaded rod 300 to rotate. The rotation of the threaded rod 300 drives the slider 400 to move laterally on the threaded rod 300, thereby driving one end of the keel frame A500 to move through the connecting part B401. This reduces the angle between the keel frame A500 and the keel frame B501, causing the limiting frame 502 to press against the inner wall of the seamless steel pipe body 100 and clamp it tightly. Multiple limiting frames 502 simultaneously... The step abuts against the inner wall of the seamless steel pipe body 100 for multi-directional clamping, thereby limiting and fixing the seamless steel pipe body 100. Reverse rotation of the threaded rod 300 can drive the slider 400 to move in the opposite direction, thereby causing the limiting frame 502 to separate from the inner wall of the seamless steel pipe body 100. This structure uses a friction-type limiting component inserted into the inner wall of the steel pipe and expanding outward to clamp the seamless steel pipe body 100 in multiple directions simultaneously. The structure of the limiting frame 502 fits the inner wall of the seamless steel pipe body 100 better, thereby avoiding deformation of the seamless steel pipe body 100 caused by force.
[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, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-efficiency, high-precision drawing device for seamless steel pipe processing, characterized in that: include; Seamless steel pipe body (100), the interior of the seamless steel pipe body (100) has a friction-type limiting component, the friction-type limiting component includes a telescopic frame (200), a threaded rod (300), a slider (400), a keel frame A (500), a keel frame B (501), and a limiting frame (502). The telescopic frame (200) has a hollow groove inside, and the slider (400) is embedded inside the hollow groove. There are multiple connecting parts B (401), and multiple connecting parts B (401) are fixedly connected to the outside of the slider (400). The outside of 200 has multiple integrally fixed connecting parts A (203). One end of the connecting part A (203) is hinged to the keel frame B (501), and one end of the connecting part B (401) is hinged to the keel frame A (500). The bottom sides of the limiting frame (502) are respectively attached to the keel frame A (500) and the keel frame B (501). Positioning pins pass through the keel frame A (500), the keel frame B (501) and the limiting frame (502). The limiting frame (502) is hinged to the keel frame A (500) and the keel frame B (501). The outside of the limiting frame (502) is attached to the inner wall of the seamless steel pipe body (100). The threaded rod (300) passes through the telescopic frame (200) and the slider (400).
2. The high-efficiency, high-precision drawing equipment for seamless steel pipe processing according to claim 1, characterized in that: The hollow groove has a hexagonal cross-section, the slider (400) has a hexagonal shape, and the outer side of the slider (400) is in contact with the hollow groove.
3. The high-efficiency, high-precision drawing equipment for seamless steel pipe processing according to claim 1, characterized in that: The telescopic frame (200) is provided with multiple guide rails (202), and the connecting part B (401) passes through the guide rails (202) and is slidably connected to the telescopic frame (200).
4. The high-efficiency, high-precision drawing equipment for seamless steel pipe processing according to claim 1, characterized in that: One end of the telescopic frame (200) has an integrally fixed positioning tube (201), the threaded rod (300) is rotatably connected to the positioning tube (201), the middle part of the slider (400) has a threaded hole, and the threaded rod (300) is threadedly connected to the slider (400).
5. The high-efficiency, high-precision drawing equipment for seamless steel pipe processing according to claim 1, characterized in that: The outer side of the limiting frame (502) is arc-shaped, and the outer wall of the limiting frame (502) has multiple protrusions.
6. The high-efficiency, high-precision drawing equipment for seamless steel pipe processing according to claim 1, characterized in that: One end of the threaded rod (300) has an integrally fixed drive rod (301), which is hexagonal in shape.