A super-large-caliber metal pipe spinning forming device

Abstract

The utility model discloses a kind of super-large caliber metal pipe fittings spinning forming devices, including lathe, spinning assembly is installed on the lathe, the spinning assembly includes first linear drive assembly, the slide of first linear drive assembly is fixedly connected fixed ring, six groups of spinning wheel assemblies are installed on the side surface of fixed ring, six groups spinning wheel assemblies are evenly distributed along the circumferential direction of fixed ring, inductive coil is installed on the other side surface of fixed ring, the spinning wheel assembly includes second linear drive assembly, the slide of second linear drive assembly is fixedly connected mounting seat, spinning wheel frame is installed on the mounting seat.The utility model uses six groups of spinning wheel assemblies to carry out spinning to blank synchronously, six groups of spinning wheel assemblies equidistant distribution, form annular restraint net, total spinning force is evenly dispersed to each spinning wheel, and blank is more balanced under stress, avoid the distortion of curved surface due to instability, reduce spinning difficulty by preheating, inhibit defect, improve forming quality.

Description

Technical Field

[0001] This utility model relates to the field of pipe spinning technology, specifically to a spinning device for ultra-large diameter metal pipes. Background Technology

[0002] Extra-large diameter metal pipe fittings refer to large-diameter metal pipe connection components used for transporting fluids (such as liquids, gases, slurries, etc.) or for structural support. They are typically characterized by large nominal diameter (DN), thicker walls, and high pressure or load capacity. The definition of "extra-large diameter" varies depending on the industry and application scenario, but generally, metal pipe fittings with DN ≥ 1000 mm (or larger, such as DN 2000 mm and above) are considered to fall into this category, commonly found in key fields such as energy, chemical industry, water conservancy, and marine engineering. Extra-large diameter metal pipe fitting spin forming equipment is a specialized device that uses a rotating blank and applies radial / axial pressure to plastically deform it, ultimately forming a large-diameter curved or variable cross-section pipe fitting.

[0003] When spinning ultra-large diameter metal pipe fittings, fewer spinning wheels are used, and the total spinning pressure that a single spinning wheel needs to bear is large, which can easily lead to excessive ovality of the billet. Metal materials have high yield strength and work hardening tendency at room temperature. When cold spinning, the spinning wheel needs to apply extremely large radial pressure, which can easily lead to equipment overload, accelerated wear of the spinning wheel, or instability of the billet. Utility Model Content

[0004] The purpose of this invention is to provide a spinning forming device for ultra-large diameter metal pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spinning forming device for ultra-large diameter metal pipe fittings, comprising a machine tool, wherein a spinning assembly is installed on the machine tool, the spinning assembly comprising a first linear drive assembly, the slide of the first linear drive assembly being fixedly connected to a fixed ring, six sets of spinning wheel assemblies being installed on one side of the fixed ring, the six sets of spinning wheel assemblies being evenly distributed along the circumference of the fixed ring, an inductor coil being installed on the other side of the fixed ring, the spinning wheel assembly comprising a second linear drive assembly, the slide of the second linear drive assembly being fixedly connected to a mounting base, and a spinning wheel frame being installed on the mounting base.

[0006] The rotating frame is equipped with the rotating wheel body.

[0007] The rotating frame and the mounting base are fixedly connected by multiple sets of locking screws.

[0008] The machine tool includes a base plate and a main unit.

[0009] The host is connected to a rotating shaft, and one end of the rotating shaft is fixedly connected to a first pressure block.

[0010] A vertical plate is fixedly installed on one side of the upper surface of the substrate, and a hydraulic cylinder is installed on the vertical plate. The piston rod of the hydraulic cylinder is fixedly connected to a pressure rod, and one end of the pressure rod is connected to a second pressure block.

[0011] The second pressure block and the pressure rod are connected by a bearing.

[0012] The hydraulic cylinder is connected to the hydraulic system via an oil pipe.

[0013] The first and second pressing blocks are used to fix the blank, and the blank is configured as a ring structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses six sets of spinning wheel assemblies to spin the billet synchronously. The six sets of spinning wheel assemblies are equidistantly distributed to form a ring-shaped constraint network, which evenly distributes the total spinning pressure to each spinning wheel, making the billet more evenly stressed and avoiding surface distortion caused by instability.

[0015] 2. Before spinning, this utility model preheats the blank by using an inductor coil and rapidly increases the blank temperature through electromagnetic induction, thereby changing the mechanical properties and microstructure of the material, thus reducing the difficulty of spinning, suppressing defects, and improving the molding quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the spinning assembly of this utility model; Figure 3 This is a schematic diagram of the structure of the rotating wheel assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the machine tool of this utility model; Figure 5 This is a schematic diagram of the structure of the blank of this utility model.

[0017] In the diagram: 1. Machine tool; 2. Spinning assembly; 3. Blank; 11. Base plate; 12. Main machine; 13. Rotary shaft; 14. First pressure block; 15. Vertical plate; 16. Hydraulic cylinder; 17. Pressure rod; 18. Second pressure block; 21. First linear drive assembly; 22. Fixing ring; 23. Spinning wheel assembly; 24. Inductor coil; 231. Second linear drive assembly; 232. Mounting base; 233. Spinning wheel frame; 234. Spinning wheel body; 235. Locking screw. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-5 This utility model provides a technical solution: a spinning forming device for ultra-large diameter metal pipe fittings, including a machine tool 1, a spinning assembly 2 installed on the machine tool 1, the spinning assembly 2 including a first linear drive assembly 21, the slide of the first linear drive assembly 21 being fixedly connected to a fixed ring 22, six sets of spinning wheel assemblies 23 being installed on one side of the fixed ring 22, the six sets of spinning wheel assemblies 23 being evenly distributed along the circumference of the fixed ring 22, an inductor coil 24 being installed on the other side of the fixed ring 22, the inductor coil 24 being energized with a high-frequency current to generate an alternating magnetic field, inducing eddy currents on the surface of the blank 3, generating heat by utilizing the material resistance loss, the heat penetrating from the surface to the center through thermal conduction, preheating the blank 3, the spinning wheel assembly 23 including a second linear drive assembly 231, the slide of the second linear drive assembly 231 being fixedly connected to a mounting base 232, and a spinning wheel frame 233 being installed on the mounting base 232.

[0020] The first linear drive assembly 21 is used to drive the spinning assembly 2 to move axially and adjust the horizontal position of the multiple sets of spinning wheel assemblies 23. The second linear drive assembly 231 is used to drive the spinning wheel frame 233 to move along the radial direction of the fixed ring 22. During the spinning process of the pipe fitting, six sets of spinning wheel assemblies 23 are used to spin the blank 3 simultaneously. The six sets of spinning wheel assemblies 23 are equidistantly distributed to form a ring constraint network, which evenly distributes the total spinning force to each spinning wheel. The blank 3 is subjected to more balanced force, avoiding surface distortion caused by instability.

[0021] The position of the inductor coil 24 is adjusted by the first linear drive component 21. Before spinning, the blank 3 is preheated by the inductor coil 24. The temperature of the blank 3 is rapidly increased by electromagnetic induction, which changes the mechanical properties and microstructure of the material, thereby reducing the spinning difficulty, suppressing defects and improving the molding quality.

[0022] Among them, the spinning frame 233 is equipped with a spinning body 234. During spinning, the spinning body 234 contacts the rotating blank 3. Through radial pressing force and axial feeding force, the rotational kinetic energy of the spinning machine is converted into the plastic deformation energy of the blank 3, so that the blank 3 fits the target curved surface and finally the blank 3 is formed into the target pipe.

[0023] The swivel frame 233 and the mounting base 232 are fixedly connected by multiple sets of locking screws 235. The swivel frame 233 and the mounting base 232 are detachable, making it convenient to replace the swivel body 234.

[0024] The machine tool 1 includes a base plate 11 and a host machine 12.

[0025] The host 12 is connected to the rotating shaft 13. One end of the rotating shaft 13 is fixedly connected to the first pressure block 14. The host 12 has a built-in power mechanism to drive the rotating shaft 13 to rotate. The rotating shaft 13 drives the first pressure block 14 at one end of it to rotate synchronously.

[0026] A vertical plate 15 is fixedly installed on one side of the upper surface of the substrate 11. A hydraulic cylinder 16 is installed on the vertical plate 15. The piston rod of the hydraulic cylinder 16 is fixedly connected to a pressure rod 17. One end of the pressure rod 17 is connected to a second pressure block 18.

[0027] The second pressure block 18 is connected to the pressure rod 17 by a bearing, and the second pressure block 18 can rotate relative to the pressure rod 17.

[0028] The hydraulic cylinder 16 is connected to the hydraulic system via an oil pipe. The hydraulic system includes a directional valve, an oil tank, and a hydraulic pump.

[0029] When the hydraulic cylinder 16 is working, it drives the pressure rod 17 at one end to move, and the pressure rod 17 drives the second pressure block 18 to move, such as... Figure 4 As shown, the blank 3 is clamped and fixed by the first pressure block 14 and the second pressure block 18, and the blank 3 is driven to rotate.

[0030] The first pressure block 14 and the second pressure block 18 are used to fix the blank 3, and the blank 3 is set as an annular structure. The corresponding blank 3 is selected according to the pipe size requirements. The radial and axial pressures are applied to the high-speed rotating annular blank 3 by the rotating wheel, so that it undergoes continuous plastic deformation and finally fits the target shape to form an ultra-large diameter metal pipe without weld seams.

[0031] Working principle: During use, the blank 3 is clamped and fixed by the first pressure block 14 and the second pressure block 18. The position of the inductor coil 24 is adjusted by the first linear drive component 21. Before spinning, the blank 3 is preheated by the inductor coil 24. The temperature of the blank 3 is rapidly increased by electromagnetic induction, which changes the mechanical properties and microstructure of the material. After preheating, the rotating shaft 13 of the host 12 drives the blank 3 to rotate at high speed. The first linear drive component 21 drives multiple sets of spinning wheels to move axially, and the second linear drive component 231 drives multiple sets of spinning wheels to move radially. The multiple sets of spinning wheels apply radial and axial pressure to the high-speed rotating annular blank 3, causing it to undergo continuous plastic deformation and finally conform to the target shape to form an integral, weld-free, ultra-large diameter metal pipe. The six sets of spinning wheel components 23 are equidistantly distributed to form an annular constraint network, which evenly distributes the total spinning pressure to each spinning wheel, making the blank 3 more evenly stressed and avoiding surface distortion caused by instability.

[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 spinning forming device for ultra-large diameter metal pipe fittings, comprising a machine tool (1), characterized in that: The machine tool (1) is equipped with a spinning assembly (2), which includes a first linear drive assembly (21). The slide of the first linear drive assembly (21) is fixedly connected to a fixed ring (22). Six sets of spinning wheel assemblies (23) are installed on one side of the fixed ring (22). The six sets of spinning wheel assemblies (23) are evenly distributed along the circumference of the fixed ring (22). An inductor coil (24) is installed on the other side of the fixed ring (22). The spinning wheel assembly (23) includes a second linear drive assembly (231). The slide of the second linear drive assembly (231) is fixedly connected to a mounting base (232). A spinning wheel frame (233) is installed on the mounting base (232).

2. The spinning forming device for ultra-large diameter metal pipes according to claim 1, characterized in that: The main body of the rotating wheel (234) is mounted on the rotating wheel frame (233).

3. The spinning forming device for ultra-large diameter metal pipes according to claim 1, characterized in that: The swivel frame (233) and the mounting base (232) are fixedly connected by multiple sets of locking screws (235).

4. The spinning forming device for ultra-large diameter metal pipes according to claim 1, characterized in that: The machine tool (1) includes a base plate (11) and a host (12).

5. The spinning forming device for ultra-large diameter metal pipes according to claim 4, characterized in that: The host (12) is connected to a rotating shaft (13), and one end of the rotating shaft (13) is fixedly connected to a first pressure block (14).

6. The spinning forming device for ultra-large diameter metal pipes according to claim 5, characterized in that: A vertical plate (15) is fixedly provided on one side of the upper surface of the substrate (11). A hydraulic cylinder (16) is installed on the vertical plate (15). The piston rod of the hydraulic cylinder (16) is fixedly connected to a pressure rod (17). One end of the pressure rod (17) is connected to a second pressure block (18).

7. The spinning forming device for ultra-large diameter metal pipes according to claim 6, characterized in that: The second pressure block (18) is connected to the pressure rod (17) by a bearing.

8. The spinning forming device for ultra-large diameter metal pipes according to claim 7, characterized in that: The hydraulic cylinder (16) is connected to the hydraulic system via an oil pipe.

9. The spinning forming device for ultra-large diameter metal pipes according to claim 8, characterized in that: The first pressing block (14) and the second pressing block (18) are used to fix the blank (3), and the blank (3) is set as a ring structure.

Images