Seamless steel pipe roll thread die

Abstract

The utility model relates to a seamless steel pipe roll thread die belongs to metal pipe processing technical field, is designed to the thread rolling demand of pipe material (especially seamless steel pipe), adopts semicircular thread tooth shape and so on feature, is more suitable for the plastic flow of pipe wall material, reduces the risk of cracking, improves thread forming quality and strength, roll pressure axle and roll pressure wheel all adopt quick dismounting design (quick -release joint and round nut locking), makes the replacement die specification very convenient, shortens the downtime change type time, is applicable to the flexible production of multivariety, small batch, utilizes the swing motor of practical servo / step principle, can accurate control swing angle to accurate control the radial feed of roll pressure wheel, guarantees the machining accuracy and consistency of thread depth.

Description

Technical Field

[0001] This utility model belongs to the field of metal pipe processing technology, specifically relating to a seamless steel pipe roll forming thread mold. Background Technology

[0002] In the production of steel pipes for furniture, threads are typically machined at both ends of the pipe for easy connection to other components. Conventional thread rolling dies (such as flat dies, round dies, or planetary thread rolling wheels) are usually designed for bars or pipes of equal diameter. However, when thread rolling is required on reducers with different diameters at both ends, especially when the dies need to be positioned at different diameter sections of the reducer, the installation space and clearance requirements of conventional dies become problematic. For example, when machining the smaller diameter end of a reducer, the die needs to be close enough to the pipe body but without interfering with the larger diameter end. Existing die structures often fail to meet this requirement compactly, resulting in bulky equipment or limited processing range. Therefore, a specialized die with a compact structure, good clearance capability, and suitability for thread rolling of pipes (especially reducers) is needed. Summary of the Invention

[0003] The present invention mainly addresses the technical problems existing in the prior art by providing a seamless steel pipe roll forming die.

[0004] The above-mentioned technical problems of the present invention are mainly solved by the following technical solution: a seamless steel pipe roll forming thread mold, comprising a first rotating shaft and a swing motor, a swing plate is mounted on the drive shaft of the swing motor, a roll forming motor is provided on the swing plate, a roll forming wheel is connected to the drive end of the roll forming motor, a roll forming shaft is connected to the first rotating shaft, and the roll forming wheel and the roll forming shaft are used in cooperation.

[0005] Preferably, the roller is provided with a clearance hole to facilitate the insertion of the pipe.

[0006] Preferably, the surface of the roller and the surface of the roller shaft are provided with threaded teeth that can cooperate with each other.

[0007] Preferably, the thread cross-section of both the roller and the roller shaft is semi-circular, so that when the oscillating motor drives the oscillating plate to press the roller onto the roller shaft, the threads of the two can mesh with each other.

[0008] Preferably, the roller shaft is connected to the first rotating shaft via a quick-release joint.

[0009] Preferably, the roller is locked to the drive end of the roller motor by a round nut.

[0010] The beneficial effects of this invention are as follows:

[0011] Designed specifically for the thread rolling requirements of pipes (especially seamless steel pipes), it adopts features such as semi-circular thread teeth, which are more suitable for the plastic flow of pipe wall materials, reduce the risk of cracking, and improve the quality and strength of thread forming.

[0012] Both the roller shaft and roller roller adopt a quick-release design (quick-release connector and round nut locking), which makes it very convenient to change mold specifications, shortens downtime for mold changeover, and is suitable for flexible production of multiple varieties and small batches.

[0013] By utilizing a swing motor based on practical servo / stepping principles, the swing angle can be precisely controlled, thereby precisely controlling the radial feed of the roller and ensuring the machining accuracy and consistency of the thread depth. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of one type of thread tooth structure of the present invention.

[0016] In the diagram: 6. Swing motor; 8. Roller shaft; 9. Quick-release connector; 12. First rotating shaft; 51. Swing plate; 52. Roller motor; 53. Roller wheel; 531. Clearance hole; 532. Threaded tooth; 54. Round nut. Detailed Implementation

[0017] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] Example: A seamless steel pipe roll forming die, such as Figures 1-2 As shown, it includes a first rotating shaft 12 and a swing motor 6. A swing plate 51 is mounted on the drive shaft of the swing motor 6. A roller press motor 52 is provided on the swing plate 51. A roller press wheel 53 is connected to the drive end of the roller press motor 52. A roller press shaft 8 is connected to the first rotating shaft 12. The roller press wheel 53 and the roller press shaft 8 are used in conjunction.

[0019] The roller is provided with a clearance hole 531 to facilitate the insertion of the pipe; the surface of the roller 53 and the surface of the roller shaft 8 are provided with threaded teeth 532 that can cooperate with each other; the thread cross-section shape of the surfaces of the roller 53 and the roller shaft 8 is semi-circular, and when the swing motor 6 drives the swing plate 51 to press the roller 53 onto the roller shaft 8, the threads of the two can mesh with each other.

[0020] The roller shaft 8 is connected to the first rotating shaft 12 via a quick-release connector 9; the roller wheel 53 is locked to the drive end of the roller motor 52 via a round nut 54; the core of the mold includes a fixed first rotating shaft 12 and a swing plate 51 driven by a swing motor 6. The first rotating shaft 12 is supported by a bearing seat and can be quickly installed with roller shafts 8 of different specifications via a quick-release connector 9 (such as an elastic expansion sleeve). The surface of the roller shaft 8 is machined with semi-circular threaded teeth 532.

[0021] The drive shaft of the oscillating motor 6 (servo motor) is fixedly connected to the oscillating plate 51. A roller press motor 52 is mounted on the oscillating plate 51. The output shaft end of the roller press motor 52 is machined with an external thread, and the roller press wheel 53 mates with it through an internal thread and is locked with a round nut 54 to prevent loosening. The center of the roller press wheel 53 is machined with a large-diameter clearance hole 531, and its surface is also machined with semi-circular thread teeth 532 that match the roller press shaft 8.

[0022] During processing, the end of the steel pipe is placed between the roller 53 and the roller shaft 8. The roller motor 52 drives the roller 53 to rotate (the roller shaft 8 can be driven or driven). At the same time, the oscillating motor 6 rotates precisely at an angle, so that the oscillating plate 51 drives the roller 53 to press against the workpiece and the roller shaft 8. Under the combined action of the semi-circular thread teeth 532, external threads are rolled out on the end wall of the steel pipe.

[0023] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. A seamless steel pipe roll forming die, comprising a first rotating shaft (12) and a swing motor (6), characterized in that: A swing plate (51) is mounted on the drive shaft of the swing motor (6). A roller press motor (52) is mounted on the swing plate (51). A roller press wheel (53) is connected to the drive end of the roller press motor (52). A roller press shaft (8) is connected to the first rotating shaft (12). The roller press wheel (53) and the roller press shaft (8) are used together.

2. The seamless steel pipe roll forming die according to claim 1, characterized in that: The roller (53) has a clearance hole (531) to facilitate the insertion of the pipe.

3. The seamless steel pipe roll forming die according to claim 1, characterized in that: The surface of the roller (53) and the surface of the roller shaft (8) are provided with threaded teeth (532) that can cooperate with each other.

4. The seamless steel pipe roll forming die according to claim 3, characterized in that: The thread cross-sections of both the roller (53) and the roller shaft (8) are semi-circular. When the oscillating motor (6) drives the oscillating plate (51) to press the roller (53) onto the roller shaft (8), their threads can mesh with each other.

5. A seamless steel pipe roll forming die according to claim 1, characterized in that: The roller shaft (8) is connected to the first rotating shaft (12) via a quick-release connector (9).

6. A seamless steel pipe roll forming die according to claim 1, characterized in that: The roller (53) and the drive end of the roller motor (52) are locked together by a round nut (54).

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