Equal-wall expanding treatment device for large-aperture seamless stainless steel pipe production

Abstract

The utility model provides an equal-wall expanding processing device for large-aperture seamless stainless steel pipe production, which comprises a support table, a workbench, a positioning track, a steel pipe clamp, a motor set, an expanding die and a high-frequency heating structure, the support table is fixedly mounted on the ground, and a support plate extending upwards is fixedly mounted at the rear end of the support table; the workbench is fixedly installed on the surface of the supporting table, the positioning rail is fixedly installed on the surface of the workbench, and the steel pipe clamp is installed on the positioning rail in a sliding mode. The motor set is fixedly installed at the front end of the supporting table, the expanding die is fixedly installed on an output shaft of the motor set, and the high-frequency heating structure is fixedly installed on the ground on one side of the supporting table. Due to the arrangement of the steel pipe clamp and the diameter expanding die, the diameter of the steel pipe can be stably expanded, metal can be softened before diameter expanding, and the diameter expanding degree can be accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe diameter expansion technology, and in particular to an equal wall diameter expansion treatment device for the production of large-diameter seamless stainless steel pipes. Background Technology

[0002] Large-diameter seamless stainless steel pipes are widely used in demanding fields such as petrochemicals, nuclear power, aerospace, and marine engineering. These applications place stringent requirements on the dimensional accuracy and mechanical properties of the steel pipes. However, traditional seamless steel pipe manufacturing processes face numerous challenges in producing large-diameter pipes, especially during the expansion process, which can easily lead to problems such as uneven inner diameter, uneven wall thickness, and deterioration of material properties. To overcome these difficulties, equal-wall expansion devices have emerged. However, existing steel pipe expansion structures still suffer from problems such as the inability to stably expand the steel pipe, the inability to soften the metal before expansion, and the inability to precisely control the degree of expansion.

[0003] Therefore, it is essential to invent a constant wall diameter expansion device for the production of large-diameter seamless stainless steel pipes. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an equal-wall diameter expansion device for the production of large-diameter seamless stainless steel pipes. This solves the problems of existing steel pipe expansion structures, which still suffer from unstable pipe expansion, inability to soften the metal before expansion, and inability to precisely control the degree of expansion. The device includes a support platform, a worktable, a positioning rail, a steel pipe clamp, a motor unit, an expansion mold, and a high-frequency heating structure. The support platform is fixedly installed on the ground, with an upwardly extending support plate fixedly installed at its rear end. The worktable is fixedly installed on the surface of the support platform, and the positioning rail is fixedly installed on the surface of the worktable. The steel pipe clamp is slidably installed on the positioning rail. The motor unit is fixedly installed at the front end of the support platform, and the expansion mold is fixedly installed on the output shaft of the motor unit. The high-frequency heating structure is fixedly installed on the ground to one side of the support platform.

[0005] The steel pipe clamp includes a guide rod, a support body, a drive push rod, and a steel pipe positioning seat. The guide rod is fixedly installed between the support plate behind the support platform and the motor assembly. The support body is slidably installed on the guide rod, and both ends of the drive push rod are fixedly installed between the support body and the support plate at the rear end of the support platform. The steel pipe positioning seat is fixedly installed above the support body.

[0006] The diameter expansion mold includes a rotating base, a force-bearing body, a diameter expansion push rod, a diameter expansion roller, and a reinforcing frame. The rotating base is fixedly mounted on the output shaft of the motor unit, and the force-bearing body is fixedly mounted on the surface of the rotating base. The diameter expansion push rod is fixedly mounted inside the force-bearing body, and the diameter expansion roller is rotatably mounted on the front end of the diameter expansion push rod. The reinforcing frame is fixedly mounted between the force-bearing bodies.

[0007] The guide rods inside the steel pipe clamp consist of two horizontal steel metal rods, and the support body can slide on the guide rods by being pushed by a set of hydraulic push rods. The steel pipe positioning seat is a steel metal seat in which a steel pipe is slidably installed and fixed by inwardly driven bolts. It has the following functions: ① Fixing the steel pipe: The steel pipe clamp ensures the stability of the steel pipe position during the expansion process by clamping the steel pipe, preventing it from moving or shifting; ② Providing guidance: The guide rods and support body structure of the steel pipe clamp ensure the linear movement of the steel pipe during the expansion process, allowing the steel pipe to accurately enter the expansion mold; ③ Positioning the steel pipe: Through the steel pipe positioning seat, the steel pipe clamp can accurately position the starting position and angle of the steel pipe, ensuring the accuracy and consistency of the expansion process.

[0008] The diameter expansion mold as a whole can be rotated by the motor unit, and the diameter expansion push rod can drive the diameter expansion roller to move outward. The diameter expansion roller can rotate. The diameter expansion roller is in contact with the inner wall of the steel pipe and has the following functions: ① Diameter expansion: The diameter expansion mold expands the inner wall of the steel pipe through the diameter expansion push rod and the diameter expansion roller, so that the inner diameter of the steel pipe reaches the predetermined size, and the diameter expansion size can be determined by the spacing between the diameter expansion rollers; ② Rotational motion: The diameter expansion mold is connected to the output shaft of the motor unit through a rotating seat, which can rotate, so that the diameter expansion roller acts evenly on the inner wall of the steel pipe, improving the uniformity and efficiency of diameter expansion; ③ Precise adjustment: The structural design of the diameter expansion mold allows the diameter expansion push rod to drive the diameter expansion roller to move outward, enabling precise diameter expansion operation and ensuring the accuracy of the diameter expansion size.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The steel pipe clamp of this utility model has the following functions: ① Fixing the steel pipe: The steel pipe clamp ensures the stability of the steel pipe position during the expansion process by clamping the steel pipe, preventing it from moving or shifting; ② Providing guidance: The guide rod and support structure of the steel pipe clamp ensure the linear movement of the steel pipe during the expansion process, enabling the steel pipe to accurately enter the expansion mold; ③ Positioning the steel pipe: Through the steel pipe positioning seat, the steel pipe clamp can accurately position the starting position and angle of the steel pipe, ensuring the accuracy and consistency of the expansion process.

[0011] 2. The expansion mold of this utility model has the following functions: ① Expansion: The expansion mold expands the diameter of the steel pipe by means of the expansion push rod and expansion roller, so that the inner diameter of the steel pipe reaches the predetermined size, and the expansion size can be determined by the spacing between the expansion rollers; ② Rotational motion:

[0012] The expanding die is connected to the output shaft of the motor unit via a rotating base, enabling it to rotate and allow the expanding roller to act evenly on the inner wall of the steel pipe, improving the uniformity and efficiency of the expanding process; ③ Precise adjustment: The structural design of the expanding die allows the expanding push rod to drive the expanding roller to move outward, enabling precise expanding operations and ensuring the accuracy of the expanding dimensions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is an enlarged view of point A of this utility model.

[0015] Figure 3 This is an enlarged view of section B of this utility model.

[0016] In the picture:

[0017] Support platform 1, workbench 2, positioning rail 3, steel pipe clamp 4, guide rod 41, support body 42, drive push rod 43, steel pipe positioning seat 44, motor unit 5, diameter expansion mold 6, rotating seat 61, force-bearing body 62, diameter expansion push rod 63, diameter expansion roller 64, reinforcing frame 65, high frequency heating structure 7. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] As attached Figure 1 To be continued Figure 3 As shown.

[0020] This utility model provides an equal-wall diameter expansion device for the production of large-diameter seamless stainless steel pipes, comprising a support platform 1, a worktable 2, a positioning rail 3, a steel pipe clamp 4, a motor unit 5, an expansion mold 6, and a high-frequency heating structure 7. The support platform 1 is fixedly installed on the ground, with an upwardly extending support plate fixedly installed at its rear end. The worktable 2 is fixedly installed on the surface of the support platform 1, and the positioning rail 3 is fixedly installed on the surface of the worktable 2. The steel pipe clamp 4 is slidably installed on the positioning rail 3. The motor unit 5 is fixedly installed at the front end of the support platform 1, and the expansion mold 6 is fixedly installed on the output shaft of the motor unit 5. The high-frequency heating structure 7 is fixedly installed on the ground to one side of the support platform 1.

[0021] The steel pipe clamp 4 includes a guide rod 41, a support body 42, a drive push rod 43, and a steel pipe positioning seat 44. The guide rod 41 is fixedly installed between the support plate behind the support platform 1 and the motor assembly 5. The support body 42 is slidably installed on the guide rod 41, and both ends of the drive push rod 43 are fixedly installed between the support body 42 and the support plate at the rear end of the support platform 1. The steel pipe positioning seat 44 is fixedly installed above the support body 42.

[0022] The diameter expansion mold 6 includes a rotating base 61, a force-bearing body 62, a diameter expansion push rod 63, a diameter expansion roller 64, and a reinforcing frame 65. The rotating base 61 is fixedly mounted on the output shaft of the motor assembly 5, and the force-bearing body 62 is fixedly mounted on the surface of the rotating base 61. The diameter expansion push rod 63 is fixedly mounted inside the force-bearing body 62, and the diameter expansion roller 64 is rotatably mounted on the front end of the diameter expansion push rod 63. The reinforcing frame 65 is fixedly mounted between the force-bearing bodies 62.

[0023] The device mainly consists of a support platform 1, a worktable 2, a positioning rail 3, a steel pipe clamp 4, a motor unit 5, an expansion mold 6, and a high-frequency heating structure 7. These components coordinate with each other to complete the expansion process of large-diameter seamless stainless steel pipes. The following is its specific working principle:

[0024] 1. Preparation and Fixation

[0025] The support platform 1 is fixedly installed on the ground, providing basic support for the entire device.

[0026] The workbench 2 is mounted on the support platform 1, and the positioning rail 3 is fixed to the surface of the workbench 2.

[0027] The operator places the steel pipe to be expanded into the steel pipe clamp 4 and performs initial positioning and fixation through the steel pipe positioning seat 44 and guide rod 41.

[0028] The drive push rod 43, through a hydraulic push rod structure, pushes the support body 42 to slide on the guide rod 41, thereby firmly fixing the steel pipe in the appropriate position.

[0029] 2. High-frequency heating

[0030] The high-frequency heating structure 7 is activated to heat the steel pipe to the appropriate processing temperature. The purpose of high-frequency heating is to soften the steel pipe material, making it easier to expand the diameter, while ensuring that the steel pipe does not develop structural defects during the heating process.

[0031] 3. Diameter expansion operation

[0032] When motor unit 5 starts, it drives the rotating seat 61 and the expansion mold 6 on its output shaft to start rotating.

[0033] Driven by the force-bearing body 62, the expanding push rod 63 pushes the expanding roller 64 to expand outward, so that it contacts the inner wall of the steel pipe.

[0034] Under the action of rotational motion and expansion push rod 63, expansion roller 64 rolls along the inner wall of steel pipe, gradually expanding the inner diameter of steel pipe to a predetermined size while maintaining uniform wall thickness.

[0035] 4. Adjustment and control

[0036] During the diameter expansion process, the precise control of the diameter expansion push rod 63 and the diameter expansion roller 64 by the motor unit 5 ensures the accuracy and uniformity of the diameter expansion dimensions.

[0037] Operators can adjust the positions of the expanding push rod 63 and the expanding roller 64 of the expanding die 6 according to actual needs to achieve the best expanding effect.

[0038] 5. Completion and Cooling

[0039] After the diameter expansion is completed, stop the motor unit 5 and the high-frequency heating structure 7.

[0040] After natural or assisted cooling, the steel pipe is removed from the steel pipe clamp 4.

[0041] Check the dimensions and wall thickness of the expanded steel pipe to ensure they meet the predetermined quality standards.

[0042] Through the above steps, the device can efficiently and accurately complete the diameter expansion process of large-diameter seamless stainless steel pipes, ensuring that the inner diameter of the steel pipe is expanded uniformly and the wall thickness is uniform, thus meeting the requirements of production and use.

[0043] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A device for equal wall expanding treatment for large diameter seamless stainless steel pipe production, characterized by: Including support platform (1), workbench (2), positioning track (3), steel pipe clamp (4), motor group (5), expanding die (6) and high frequency heating structure (7), wherein: support platform (1) is fixedly installed on the ground, and the rear end is fixedly installed with the upward extending support plate; The workbench (2) is fixedly installed on the surface of the support platform (1), and the positioning track (3) is fixedly installed on the surface of the workbench (2), and the steel pipe clamp (4) is slidably installed on the positioning track (3); The motor group (5) is fixedly installed on the front end of the support platform (1), and the expanding die (6) is fixedly installed on the output shaft of the motor group (5), and the high frequency heating structure (7) is fixedly installed on the ground on one side of the support platform (1).

2. The equal wall expanding device for producing a large diameter seamless stainless steel pipe according to claim 1, characterized in that: The steel pipe clamp (4) includes guide rod (41), support body (42), drive push rod (43) and steel pipe positioning seat (44), and the guide rod (41) is fixedly installed between the support plate behind the support platform (1) and the motor group (5); The support body (42) is slidably installed on the guide rod (41), and the two ends of the drive push rod (43) are fixedly installed between the support body (42) and the support plate at the rear end of the support platform (1); The steel pipe positioning seat (44) is fixedly installed above the support body (42).

3. The equal wall expanding device for producing a large diameter seamless stainless steel pipe according to claim 1, characterized in that: The expanding die (6) includes rotating seat (61), force body (62), expanding push rod (63), expanding roller (64) and reinforcing framework (65), and the rotating seat (61) is fixedly installed on the output shaft of the motor group (5), and the force body (62) is fixedly installed on the surface of the rotating seat (61); The expanding push rod (63) is fixedly installed in the force body (62), and the expanding roller (64) is rotatably installed at the front end of the expanding push rod (63), and the reinforcing framework (65) is fixedly installed between the force body (62).

4. The equal wall expanding device for producing a large diameter seamless stainless steel pipe according to claim 2, characterized in that: The guide rod (41) in the steel pipe clamp (4) adopts two horizontal steel rods, and the support body (42) can slide on the guide rod (41) by the driving of the drive push rod (43), and the drive push rod (43) adopts a group of hydraulic push rods; The steel pipe positioning seat (44) adopts a steel seat, a steel pipe is slidably installed in the steel pipe positioning seat (44), and is fixedly screwed by the screw.

5. The equal wall expanding device for producing a large diameter seamless stainless steel pipe according to claim 3, characterized in that: The expanding die (6) can be rotated by the motor group (5), and the expanding push rod (63) can drive the expanding roller (64) to move outward, and the expanding roller (64) can rotate; The expanding roller (64) is attached to the inner wall of the steel pipe.

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