Thread forming device

Abstract

The utility model discloses a thread forming device which comprises a thread mandrel, a sleeve and a rotation driving mechanism, the sleeve is provided with a pin rail in the axial direction, the rotation driving mechanism drives the sleeve to rotate in the circumferential direction, the thread mandrel sequentially comprises a driving section, a thread section and an extrusion section in the axial direction, and extrusion threads are arranged on the periphery of the extrusion section. The driving section is in sliding connection with the pin rail through a pin; and the threaded section is in threaded connection with a lead screw nut which is fixedly arranged above the rotary driving mechanism. Through cooperation of the lead screw and the nut, tapping forming can be completed only by rotating the driving mechanism. According to the structural design, the structure of existing thread forming equipment is simplified, the manufacturing and maintaining cost is reduced, and meanwhile operation convenience and machining precision are improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a thread forming device. Background Art

[0002] In the field of mechanical processing, thread manufacturing is a very important part. Thread forming technology is widely used in various mechanical equipment and devices to achieve fastening and connection functions. In the prior art, thread forming drive devices mainly include rotation drive mechanisms and extrusion drive mechanisms.

[0003] The rotary drive mechanism mainly drives the mandrel or workpiece to rotate through rotary motion to form threads by cutting or extrusion. However, during the processing, the extrusion drive mechanism is also required to apply axial pressure to control the axial feed of the mandrel or workpiece to ensure the precise forming of the thread. This places high demands on the synchronous control accuracy of the equipment, increasing the complexity and cost of the equipment; and the extrusion drive mechanism usually needs to be equipped with a complex hydraulic or pneumatic system to achieve sufficient extrusion force and precise control. Therefore, the manufacturing and maintenance costs of the equipment are high, and the professional skills of the operator are required to be high. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a thread forming device, which innovatively solves many difficult problems in the prior art through the ingenious cooperation of the lead screw and the nut.

[0005] The technical solution of the utility model is:

[0006] It includes a threaded core shaft, a sleeve with a pin track along the axial direction, and a rotary drive mechanism for driving the sleeve to rotate circumferentially. The threaded core shaft includes a driving section, a threaded section and an extrusion section in sequence along the axial direction. The outer circumference of the extrusion section is provided with an extrusion thread. The driving section is slidably connected to the pin track through a pin; the threaded section is connected to the internal thread of a lead screw nut fixedly arranged above the rotary drive mechanism.

[0007] Its further technical solution is:

[0008] It also includes a nut mounting plate fixedly arranged above the rotary drive mechanism, the nut mounting plate has a core shaft through hole penetrating in the axial direction for the threaded core shaft to pass through, and the lead screw nut is threadedly connected in the core shaft through hole.

[0009] Its further technical solution is:

[0010] The driving section is provided with a pin through hole along the radial direction, the pin is passed through the pin through hole and both ends of the pin are located in the pin track.

[0011] Its further technical solution is:

[0012] It also includes a base, the rotation drive mechanism is fixed on the base, and the two ends of the nut mounting plate are fixedly connected to the base through supporting legs.

[0013] Its further technical solution is:

[0014] The pin tracks are provided with two groups, and the two groups of the pin tracks are symmetrically arranged on the sleeve.

[0015] Its further technical solution is:

[0016] The sleeve comprises a sleeve connecting portion, and the output end of the rotary drive mechanism is drivingly connected to the sleeve connecting portion.

[0017] Its further technical solution is:

[0018] The sleeve comprises a straight tube portion, and the pin tracks are provided in a plurality of groups, and the plurality of groups of the pin tracks are evenly distributed on the straight tube portion.

[0019] The beneficial technical effect of the utility model is that by adopting the transmission motion of the threaded mandrel and the lead screw nut, the rotational motion of the rotary drive mechanism can be directly converted into the axial feed motion of the threaded mandrel. In this way, no additional extrusion drive mechanism is required, and the forward tapping forming can be completed only by a rotary drive mechanism. This improvement not only simplifies the equipment structure, reduces the complexity and cost of the equipment, but also improves the convenience of operation and processing accuracy, and has broad application prospects and market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the frame structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the sleeve structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the threaded mandrel of the utility model;

[0024] Among them: 1. frame; 11. base; 12. nut mounting plate; 13. support leg; 14. spindle through hole; 2. rotary drive mechanism; 3. threaded spindle; 31. drive section; 32. threaded section; 33. extrusion section; 34. pin through hole; 4. sleeve; 41. sleeve connecting part; 42. pin track; 43. straight tube part; 5. pin; 6. lead screw nut. DETAILED DESCRIPTION

[0025] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0026] like Figure 1 As shown, a thread forming device described in the utility model includes a frame 1, a rotation drive mechanism 2 and a threaded core shaft 3. The rotation drive mechanism 2 is arranged at the bottom of the frame 1, and the rotation drive mechanism 2 can drive the threaded core shaft 3 to rotate along the circumferential direction.

[0027] Further, such as Figure 3 The rotary drive mechanism 2 is a rotor motor, the sleeve 4 includes a sleeve connection portion 41 and a straight portion 43 having a pin track 42 in the axial direction, and the rotor of the rotor motor is drivingly connected to the sleeve connection portion 41. Preferably, two groups of the pin tracks 42 are provided, and the two groups of the pin tracks 42 are symmetrically arranged on the sleeve 4.

[0028] The pin tracks 42 may be provided in multiple groups, and the multiple groups of the pin tracks 42 are evenly distributed on the straight tube portion 43 , or the multiple groups of the pin tracks 42 are provided in pairs and are symmetrically provided on the straight tube portion 43 in pairs.

[0029] The rotor of the rotor motor is sleeved and fixed on the outer side of the cylindrical surface of the sleeve connecting portion 41 , and the threaded core shaft 3 is slidably connected to the pin track 42 via the pin 5 .

[0030] like Figure 4 The threaded core shaft 3 includes a driving section 31, a threaded section 32 and an extrusion section 33 from bottom to top in the axial direction. The outer periphery of the extrusion section 33 is provided with an extrusion thread. The threaded section 32 is connected to the upper part of the frame 1 through a screw nut 6. The driving section 31 is provided with a pin through hole 34 along the radial direction. The pin 5 is penetrated through the pin through hole 34 and both ends of the pin 5 are located in the pin track 42. Under the drive of the rotor motor, the pin 5 is slidably connected to the pin track 42 along the axial direction.

[0031] In this embodiment, Figure 2 As shown, the frame 1 includes a base 11, the rotor motor is arranged on the base 11, and a nut mounting plate 12 fixedly connected to the base 11 is arranged above the rotor motor. Specifically, both ends of the nut mounting plate 12 are fixedly connected to the base 11 through supporting legs 13. The nut mounting plate 12 has a spindle through hole 14 that penetrates in the axial direction for the threaded spindle 3 to pass through, the lead screw nut 6 is threadedly connected in the spindle through hole 14, and the threaded section 32 of the threaded spindle 3 is connected to the internal thread of the lead screw nut 6.

[0032] During installation, first insert the threaded mandrel 3 from the upper end of the mandrel through hole 14 of the nut mounting plate 12, then sleeve the lead screw nut 6 on the threaded mandrel 3 and threadedly rotate it to the corresponding position, then the external thread of the lead screw nut 6 is threadedly connected with the internal thread of the mandrel through hole 14, and the driving section 31 of the threaded mandrel 3 is located in the straight tube portion 43 of the sleeve 4, and the threaded mandrel 3 is adjusted so that the pin through hole 34 and the pin track 42 are located in the same radial direction, and the pin 5 is sequentially inserted through the pin track 42 and the pin through hole 34 until it reaches another symmetrically arranged pin track 42, and the installation is completed. When replacing the threaded mandrel 3, just replace the corresponding lead screw nut 6.

[0033] The working principle of the structure is as follows: driven by the rotor motor, the rotor of the rotor motor drives the threaded core shaft 3 to rotate circumferentially through the rotation of the sleeve 4 during movement. Since the lead screw nut 6 is fixed, the threaded segment 32 of the threaded core shaft 3 realizes the linear feed movement of the threaded core shaft 3 through the lead screw nut 6, and drives the pin 5 to slide in the pin track 42, thereby driving the extrusion segment 33 at the end of the threaded core shaft 3 to realize the spiral feed movement. After the thread forming is completed, the rotor motor drives the threaded core shaft 3 to rotate in the opposite direction and exit, preparing for the next processing.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A thread forming device, characterized in that: The invention comprises a threaded core shaft (3), a sleeve (4) having a pin track (42) along the axial direction, and a rotary drive mechanism (2) for driving the sleeve (4) to rotate circumferentially, wherein the threaded core shaft (3) comprises a driving section (31), a threaded section (32) and an extrusion section (33) in sequence along the axial direction, the extrusion section (33) is provided with an extrusion thread on its outer circumference, the driving section (31) is slidably connected to the pin track (42) via a pin (5), and the threaded section (32) is connected to the internal thread of a lead screw nut (6) fixedly arranged above the rotary drive mechanism (2).

2. A thread forming device according to claim 1, characterized in that: It also includes a nut mounting plate (12) fixedly arranged above the rotary drive mechanism (2), the nut mounting plate (12) having a core shaft through hole (14) extending in the axial direction for the threaded core shaft (3) to pass through, and the lead screw nut (6) is threadedly connected in the core shaft through hole (14).

3. A thread forming device according to claim 1, characterized in that: The driving section (31) is provided with a pin through hole (34) along the radial direction, the pin (5) is passed through the pin through hole (34) and both ends of the pin (5) are located in the pin track (42).

4. A thread forming device according to claim 2, characterized in that: It also comprises a base (11), the rotary drive mechanism (2) is fixedly arranged on the base (11), and the two ends of the nut mounting plate (12) are fixedly connected to the base (11) via support legs (13) respectively.

5. A thread forming device according to claim 1, characterized in that: The pin tracks (42) are provided in two groups, and the two groups of the pin tracks (42) are symmetrically arranged on the sleeve (4).

6. A thread forming device according to claim 1, characterized in that: The sleeve (4) comprises a sleeve connecting portion (41), and the output end of the rotary drive mechanism (2) is drivingly connected to the sleeve connecting portion (41).

7. A thread forming device according to claim 1, characterized in that: The sleeve (4) comprises a straight tube portion (43), and a plurality of groups of the pin tracks (42) are provided, and the plurality of groups of the pin tracks (42) are evenly distributed on the straight tube portion (43).

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