A drive structure for a female pipe forming apparatus

Abstract

The utility model discloses a kind of driving structure for internal thread pipe forming device, it is related to pipe internal thread processing field, to solve the problem that existing technology cannot accurately and uniformly adjust mobile plug, the technical scheme used is, including servo motor, hollow rotary table and mobile plug, the servo motor is driven to adjust nut rotation by the hollow rotary table, it is engaged by thread between the adjusting nut and the mobile plug, the servo motor is connected with the PLC control center of outside;Rotary connection has driving shaft and connecting sleeve on the hollow rotary table, driving shaft and the engaging transmission between connecting sleeve;The driving shaft is driven by the servo motor, the connecting sleeve is connected with the adjusting nut, adopt the connection of servo motor and the PLC control system of outside, form a set of servo system, the position of mobile plug can be accurately and uniformly adjusted;Realize the new process breakthrough of pipe drawing process core head position continuous micro-motion adjustment.

Description

Technical Field

[0001] This utility model relates to the field of pipe internal thread processing technology, specifically a drive structure for an internal thread pipe forming device. Background Technology

[0002] Chinese patent CN117463850B discloses a special device for forming internally threaded pipes. The technical solution adopted includes a mandrel assembly, a spinning assembly, and an ultrasonic rolling assembly. The invention utilizes a first motor to drive an adjusting nut, thereby driving a moving plug to precisely adjust the relative position of the mandrel assembly and the spinning assembly, thus realizing the adjustment of the spinning position of the threaded mandrel and the spinning ring.

[0003] The above technical solution proposes using a motor to drive the adjusting nut to control the displacement of the moving plug, thereby realizing the processing of the internal thread of the pipe. However, it does not specify the specific driving method. If the output end of the motor is used directly to drive the adjusting nut, there will be a problem of poor internal thread forming accuracy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a drive structure for an internal thread pipe forming device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model discloses a drive structure for an internal threaded pipe forming device. The technical solution includes a servo motor, a hollow turntable, and a moving plug. The servo motor drives an adjusting nut to rotate through the hollow turntable. The adjusting nut and the moving plug are engaged by threads. The servo motor is connected to an external PLC control center.

[0006] A drive shaft and a connecting sleeve are rotatably connected to the hollow turntable, and the drive shaft and the connecting sleeve engage in transmission.

[0007] The drive shaft is driven by the servo motor, and the connecting sleeve is connected to the adjusting nut. The servo motor is connected to an external PLC control system to form a servo system, which can accurately and uniformly adjust the position of the moving plug; achieving a new technological breakthrough in continuous micro-adjustment of the core position during the tube drawing process.

[0008] As a preferred embodiment of this utility model, the hollow turntable is provided with a driving cavity and a rotating cavity, and the driving cavity and the rotating cavity are connected.

[0009] In a preferred embodiment of this utility model, the drive shaft is rotatably connected to the drive cavity via a bearing; a support sleeve is provided in the rotating cavity, and the connecting sleeve is rotatably connected to the support sleeve.

[0010] As a preferred technical solution of this utility model, the drive shaft includes a support part and drive teeth. The support part is rotatably connected to the hollow turntable through a bearing. The support part corresponds to the position of the servo motor and is connected to the output shaft of the servo motor. The drive shaft is also provided with a retaining ring for positioning with the hollow turntable.

[0011] As a preferred technical solution of this utility model, the drive teeth are located at one end of the drive shaft near the rotating cavity and are used for meshing transmission with the connecting sleeve. By setting the drive shaft and the connecting sleeve in the hollow turntable, and by setting drive teeth and transmission tooth grooves on the outer walls of the two respectively, meshing transmission is formed. By controlling the number of teeth, the control accuracy can be improved, the outer surface quality of the product can be significantly improved, and the product's weight per unit weight, ellipticity and wall thickness deviation can be controlled more precisely.

[0012] As a preferred embodiment of this utility model, one end of the connecting sleeve is connected to the adjusting nut by a bolt, and a transmission tooth groove is provided on the side wall of the connecting sleeve for meshing and transmission with the drive shaft.

[0013] As a preferred embodiment of this utility model, the inner wall of the connecting sleeve is rotatably connected to the supporting sleeve, and a sealing ring is provided between the outer wall of the connecting sleeve and the hollow turntable.

[0014] Compared with the prior art, the beneficial effects of this utility model are: by using a servo motor connected to an external PLC control system, a servo system is formed, which can accurately and uniformly adjust the position of the moving plug; achieving a new technological breakthrough in the continuous micro-adjustment of the core position during the tube drawing process.

[0015] In this invention, a drive shaft and a connecting sleeve are set inside a hollow turntable. Drive teeth and transmission grooves are respectively set on the outer walls of the two to form a meshing transmission. By controlling the number of teeth, the control accuracy can be improved, significantly enhancing the outer surface quality of the product. This allows for more precise control of the product's weight per unit weight, ellipticity, and wall thickness deviation. Attached Figure Description

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

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 Partial cross-section of this utility model Figure 1 ;

[0019] Figure 4 Partial cross-section of this utility model Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the hollow turntable structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the drive shaft structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the connecting sleeve structure of this utility model.

[0023] In the diagram: 1. Servo motor; 2. Hollow turntable; 3. Moving plug; 4. Adjusting nut; 5. Connecting sleeve; 6. Drive shaft; 7. Bearing; 8. Sealing ring;

[0024] 21. Drive cavity; 22. Rotating cavity; 23. Support sleeve; 51. Transmission tooth groove; 61. Support part; 62. Drive tooth; 63. Retaining ring. Detailed Implementation

[0025] 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. Example 1

[0026] like Figures 1 to 7 As shown, this utility model discloses a drive structure for an internal threaded pipe forming device. The technical solution adopted includes a servo motor 1, a hollow turntable 2, and a moving plug 3. The servo motor 1 drives the adjusting nut 4 to rotate through the hollow turntable 2. The adjusting nut 4 and the moving plug 3 are engaged by threads. The servo motor 1 is connected to an external PLC control center to form a servo system.

[0027] A drive shaft 6 and a connecting sleeve 5 are rotatably connected on the hollow turntable 2. The drive shaft 6 and the connecting sleeve 5 mesh and drive each other. When the drive shaft 6 rotates, it drives the adjusting nut 4 through the meshing relationship with the connecting sleeve 5. The drive shaft 6 is driven by a servo motor 1, and the connecting sleeve 5 is connected to the adjusting nut 4.

[0028] The hollow turntable 2 is provided with a drive cavity 21 and a rotating cavity 22, and the drive cavity 21 and the rotating cavity 22 are connected for meshing transmission between the drive shaft 6 and the connecting sleeve 5.

[0029] The drive shaft 6 is rotatably connected to the drive cavity 21 via the bearing 7; the rotating cavity 22 is provided with a support sleeve 23, and the connecting sleeve 5 is rotatably connected to the support sleeve 23.

[0030] The inner wall of the connecting sleeve 5 is rotatably connected to the support sleeve 23, and a sealing ring 8 is provided between the outer wall of the connecting sleeve 5 and the hollow turntable 2.

[0031] The drive shaft 6 includes a support part 61 and a drive tooth 62. The support part 61 is rotatably connected to the hollow turntable 2 through a bearing 7. The support part 61 is positioned corresponding to the servo motor 1 and is connected to the output shaft of the servo motor 1. The drive shaft 6 is also provided with a retaining ring 63 for positioning with the hollow turntable 2.

[0032] The drive tooth 62 is located at one end of the drive shaft 6 near the rotating cavity 22 and is used for meshing and transmission with the connecting sleeve 5.

[0033] One end of the connecting sleeve 5 is connected to the adjusting nut 4 by bolts, and the side wall of the connecting sleeve 5 is provided with a transmission tooth groove 51 that meshes with the drive shaft 6 for transmission.

[0034] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0035] Components not described in detail in this article are existing technologies.

[0036] 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 drive structure for an internal threaded pipe forming device, comprising a servo motor (1), a hollow turntable (2) and a moving plug (3), wherein the servo motor (1) drives an adjusting nut (4) to rotate through the hollow turntable (2), the adjusting nut (4) and the moving plug (3) are engaged by threads, and the servo motor (1) is connected to an external PLC control center; Its features are: The hollow turntable (2) is rotatably connected to a drive shaft (6) and a connecting sleeve (5), and the drive shaft (6) and the connecting sleeve (5) mesh and transmit power. The drive shaft (6) is driven by the servo motor (1), and the connecting sleeve (5) is connected to the adjusting nut (4).

2. The driving structure for an internal threaded pipe forming device according to claim 1, characterized in that: The hollow turntable (2) is provided with a drive cavity (21) and a rotation cavity (22), and the drive cavity (21) and the rotation cavity (22) are connected.

3. The driving structure for an internal threaded pipe forming device according to claim 2, characterized in that: The drive shaft (6) is rotatably connected to the drive cavity (21) via a bearing (7); a support sleeve (23) is provided in the rotating cavity (22), and the connecting sleeve (5) is rotatably connected to the support sleeve (23).

4. The driving structure for an internal threaded pipe forming device according to claim 2, characterized in that: The drive shaft (6) includes a support part (61) and drive teeth (62). The support part (61) is rotatably connected to the hollow turntable (2) through a bearing (7). The support part (61) is positioned opposite to the servo motor (1) and is connected to the output shaft of the servo motor (1). The drive shaft (6) is also provided with a retaining ring (63) for positioning with the hollow turntable (2).

5. The driving structure for an internal threaded pipe forming device according to claim 4, characterized in that: The drive teeth (62) are located at one end of the drive shaft (6) near the rotating cavity (22) for meshing and transmission with the connecting sleeve (5).

6. The driving structure for an internal threaded pipe forming device according to claim 1, characterized in that: One end of the connecting sleeve (5) is connected to the adjusting nut (4) by a bolt, and a transmission tooth groove (51) is provided on the side wall of the connecting sleeve (5) to mesh with the drive shaft (6).

7. The driving structure for an internal threaded pipe forming device according to claim 3, characterized in that: The inner wall of the connecting sleeve (5) is rotatably connected to the support sleeve (23), and a sealing ring (8) is provided between the outer wall of the connecting sleeve (5) and the hollow turntable (2).

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