External thread tapping die

Abstract

The utility model belongs to the technical field of thread machining tools, and particularly relates to an external thread tapping mold which comprises a mold frame, a supporting ring and a machining table, round hole grooves are formed in the supporting ring and the machining table, and three sets of screw taps are rotationally connected into the supporting ring and the machining table. The outer sides of the three sets of screw taps are arranged in the supporting ring and the machining table to rotate, cutting edges are arranged on the outer sides of the screw taps, automobile pipelines are rotationally arranged on the outer sides of the cutting edges, a connecting pin is fixedly connected to the interior of the supporting ring, a nut is spirally connected to the outer side of the left end of the connecting pin, and the right side of the nut abuts against the right side of the machining table. The problems that threads need to be manually formed in the automobile pipeline, a threading die rotates on the outer side of the automobile pipeline, the speed is low when grooving is conducted on the automobile pipeline, and when a thread groove is formed, the thread groove is prone to deviating, and different threads cannot be formed are solved.

Description

Technical Field

[0001] This application belongs to the field of thread processing tooling technology, specifically an external thread tapping mold. Background Technology

[0002] An external thread tapping die is a specialized die used to machine threads on the outside of a workpiece. In automotive piping, it's necessary to create threads on the outer side of the pipe. When using an external thread tapping die, the workpiece is first fixed in a suitable position. Then, the tap is brought into contact with the workpiece surface manually or automatically. As the tap begins to rotate, its cutting edge cuts into the workpiece surface. With continuous rotation and axial feed of the tap, the cutting edge gradually removes material, forming a thread.

[0003] Meanwhile, patent application number 201521039123.2 discloses an external thread tapping device, including a mounting body and a die. The mounting body is rod-shaped, and one end of the mounting body has a fitting slot adapted to the die, in which the die is fixed. The mounting body can simultaneously serve as a carrier for the die and a connecting part for the lathe, integrating the die and the lathe for operation. The rod-shaped mounting body is suitable for mounting on the back seat of the lathe, and at the same time, the mounting body can fix the die. In use, the workpiece to be processed is mounted on the lathe spindle, the workpiece is inserted into the die slot, the lathe is started, the workpiece rotates with the lathe spindle, while the mounting body and the die remain stationary, and relative rotation occurs between the workpiece and the die.

[0004] However, in implementing the relevant technology, it was found that the aforementioned external thread tapping device has the following problems: it requires manual threading of the automotive pipe, and the speed of slotting the automotive pipe is slow when the die is rotated on the outside of the automotive pipe. Furthermore, it is easy to deviate when opening the threaded groove, and it is impossible to open different threads. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies by designing an external thread tapping die. This die features the advantage of inserting an automotive pipe into the processing table and using three sets of taps to rotate in the same direction at the same speed on the outside of the pipe. The surface is then compressed, resulting in plastic deformation. Furthermore, this rolling device has high utilization and can achieve different threads simply by changing the taps.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] An external thread tapping die includes a die frame, a support ring, and a machining table. The support ring and machining table have internal circular slots. A tap is rotatably connected inside the support ring and machining table. Three sets of taps are provided, with their outer sides rotatably positioned inside the support ring and machining table. A cutting edge is provided on the outer side of each tap, and an automotive pipe is rotatably positioned on the outer side of the cutting edge. A connecting pin is fixedly connected inside the support ring. A nut is screwed onto the outer left end of the connecting pin, and the right side of the nut is abutted against the right side of the machining table.

[0008] Preferably, a stabilizing frame is fixedly connected to the top of the mold frame, a motor is fixedly connected to the top of the stabilizing frame, a rotating shaft is fixedly connected to the outer side of the output end of the motor, a driving gear is sleeved on the outer side of the rotating shaft, and a driven gear is meshed and rotatably connected to the outer side of the driving gear.

[0009] Preferably, the outer side of the support ring is sleeved inside the driven gear, and a circular groove is opened inside the support ring. A fixing pin is spirally connected inside the circular groove of the support ring. The other end of the fixing pin is threadedly connected to the machining table, and the other end of the connecting pin is fixedly connected to the right side of the machining table.

[0010] Preferably, a fixing seat is fitted on the left side of the rotating shaft, and the bottom end of the fixing seat is fixedly connected to the top end of the mold frame.

[0011] Preferably, a support frame is fixedly connected to the top of the mold frame, and pulley grooves are provided inside the support frame and on both sides. A rotating roller is rotatably connected inside the pulley groove of the support frame, and the outer side of the processing table is rotatably arranged inside the rotating roller.

[0012] Preferably, a limiting seat is fixedly connected to the top of the mold frame, a rotating tension ring is rotatably provided inside the top of the limiting seat, an extension rod is fixedly connected to the top of the rotating tension ring, an elastic collar is rotatably provided inside the rotating tension ring, and the outer side of the automobile pipe is slidably provided inside the elastic collar.

[0013] Preferably, the outer side of the automotive pipe extends through the inside of the machining table and the support ring, and the rightmost side of the automotive pipe is located inside the three sets of taps.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] 1. This application involves placing the automotive pipe fitting inside three sets of taps, starting an external motor to drive the taps to rotate. During rotation, when the taps begin to rotate, their cutting edges cut into the workpiece surface. As the taps continue to rotate and feed axially, the cutting edges gradually remove the material, forming threads. Once the automotive pipe reaches the required cutting length, the rotation automatically stops. Furthermore, the three sets of taps are designed to be detachable. By replacing the internal taps without changing the support ring machining table, the depth of the outer thread groove of different automotive pipes can be changed.

[0016] 2. This application adds a clamp to the outside of the mold frame to support the automotive pipe, and sets an elastic collar on the outside of the automotive pipe. The automotive pipe can be clamped by rotating the outer rotating tension ring, which improves the stability of the automotive pipe during processing. During the processing, the automotive pipe does not need to rotate; only the tap needs to rotate to cut the automotive pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the support ring structure in this application;

[0019] Figure 3 This is a schematic diagram of the rotating tension ring structure in this application;

[0020] Figure 4 This is a schematic diagram of the support frame structure in this application;

[0021] Figure 5 This is a schematic diagram of the mold frame structure in this application;

[0022] Figure 6 This is a schematic diagram of the tap structure in this application.

[0023] In the diagram: 1. Mold frame; 2. Stabilizer; 3. Motor; 4. Rotating shaft; 5. Drive gear; 6. Fixed seat; 7. Driven gear; 8. Support ring; 9. Fixing pin; 10. Connecting pin; 11. Tap; 12. Nut; 13. Machining table; 14. Rotating tension ring; 15. Elastic collar; 16. Extension rod; 17. Support frame; 18. Rotating roller; 19. Automotive pipe; 20. Limit seat; 21. Cutting edge. Detailed Implementation

[0024] like Figures 1 to 6As shown, an external thread tapping die includes a die frame 1, a support ring 8, and a machining table 13. The support ring 8 and the machining table 13 have circular slots inside. Taps 11 are rotatably connected inside the support ring 8 and the machining table 13. Three sets of taps 11 are provided, with their outer sides rotatably positioned inside the support ring 8 and the machining table 13. Cutting edges 21 are provided on the outer sides of the taps 11, and automotive pipes 19 are rotatably positioned on the outer sides of the cutting edges 21. A connecting pin 10 is fixedly connected inside the support ring 8, connecting the support ring 8 and the machining table 13. A nut 12 is screwed onto the outer left end of the connecting pin 10, and the right side of the nut 12 is pressed against the right side of the machining table 13. Releasing the nut 12 releases the restriction on the connecting pin 10.

[0025] As a preferred embodiment, a stabilizing frame 2 is fixedly connected to the top of the mold frame 1, a motor 3 is fixedly connected to the top of the stabilizing frame 2, a rotating shaft 4 is fixedly connected to the outer side of the output end of the motor 3, and the driving gear 5 meshes with the driven gear 7 on the outer side to rotate.

[0026] As a preferred embodiment, the outer side of the support ring 8 is sleeved inside the driven gear 7. The support ring 8 has a circular groove inside, and a fixing pin 9 is spirally connected inside the circular groove of the support ring 8. The other end of the fixing pin 9 is threadedly connected to the processing table 13, and the other end of the connecting pin 10 is fixedly connected to the right side of the processing table 13. During the rotation, the support ring 8 is driven to rotate. During the rotation of the support ring 8, the internal tap 11 is driven to rotate. The three sets of taps 11 drive the outer side of the automobile pipe 19 to rotate.

[0027] As a preferred embodiment, a fixing seat 6 is fitted on the left side of the rotating shaft 4. The bottom end of the fixing seat 6 is fixedly connected to the top end of the mold frame 1. The fixing seat 6 is used to support the rotating shaft 4.

[0028] As a preferred embodiment, a support frame 17 is fixedly connected to the top of the mold frame 1. The support frame 17 has pulley grooves inside and on both sides. A rotating roller 18 is rotatably connected inside the pulley groove of the support frame 17. The outer side of the processing table 13 rotates inside the rotating roller 18.

[0029] As a preferred embodiment, the top of the mold frame 1 is fixedly connected to a limiting seat 20. A rotating tension ring 14 is rotatably provided inside the top of the limiting seat 20. An extension rod 16 is fixedly connected to the top of the rotating tension ring 14. An elastic collar 15 is rotatably provided inside the rotating tension ring 14. By gripping the extension rod 16 welded to the outside of the rotating tension ring 14, it is rotated. During the clockwise rotation, the elastic collar 15 is squeezed to fit into the interior of the automobile pipe 19, thereby clamping the automobile pipe 19.

[0030] As a preferred embodiment, the outer side of the automotive pipe 19 extends through the interior of the machining table 13 and the support ring 8, and the rightmost side of the automotive pipe 19 is located inside the three sets of taps 11, which are used to process the automotive pipe 19.

[0031] Among them, motor 3 and automobile pipe 19 are prior art and will not be described in detail; at the same time, this application also includes power supply, controller and switch, etc., which are not the main technical points of this patent and will not be described in detail; the "front, rear, left and right" perspectives of this device are as follows: Figure 1 The direction shown in the diagram is the reference.

[0032] Working principle:

[0033] First, the staff inserts the car pipe 19 into the inside of the elastic collar 15 and passes it through. Then, the other end of the car pipe 19 is pressed against the left side of the support ring 8. After fixing the car pipe 19, the staff holds the extension rod 16 welded to the outside of the rotating tension ring 14 and rotates it. During the clockwise rotation, the elastic collar 15 is squeezed to fit into the inside of the car pipe 19 to clamp the car pipe 19.

[0034] Next, the motor 3 at the top of the stabilizer 2 is started. The motor 3 drives the rotating shaft 4 to rotate clockwise. During the rotation, the driving gear 5 rotates, and the driving gear 5 meshes with the driven gear 7 on the outside. During the rotation, the support ring 8 rotates, and the support ring 8 drives the internal taps 11 to rotate. The three sets of taps 11 drive the automotive pipe 19 to rotate. When the taps 11 start to rotate, the cutting edge 21 cuts into the outside of the automotive pipe 19. With the continuous rotation and axial feed of the taps 11, the cutting edge 21 gradually cuts into the material. The material is cut off to form threads, and the rotation automatically stops after the automotive pipe 19 reaches the required cutting length. Then, the processed automotive pipe 19 is taken out. When different automotive pipes 19 need to be processed, the nut 12 on the outside of the connecting pin 10 is rotated counterclockwise to separate the processing table 13 from the support ring 8 on the right side. Then, the fixing pin 9 is rotated counterclockwise to remove the fixing pin 9 from the inside of the tap 11. The tap 11 is disconnected from the processing table 13, and a new tap 11 is installed. The processing table 13 and the support ring 8 are then connected to achieve fixation.

Claims

1. An external thread tapping die, comprising a die frame (1), a support ring (8), and a processing table (13), characterized in that: The support ring (8) and the machining table (13) have circular slots inside. The support ring (8) and the machining table (13) are rotatably connected to taps (11). There are three sets of taps (11). The outer sides of the three sets of taps (11) are rotatably arranged inside the support ring (8) and the machining table (13). The outer side of the taps (11) has a cutting edge (21). The outer side of the cutting edge (21) is rotatably arranged with an automobile pipe (19). The support ring (8) is fixedly connected to a connecting pin (10). The outer side of the left end of the connecting pin (10) is screwed with a nut (12). The right side of the nut (12) is pressed against the right side of the machining table (13).

2. The external thread tapping die according to claim 1, characterized in that: A stabilizing frame (2) is fixedly connected to the top of the mold frame (1), and a motor (3) is fixedly connected to the top of the stabilizing frame (2). A rotating shaft (4) is fixedly connected to the outer side of the output end of the motor (3). A drive gear (5) is sleeved on the outer side of the rotating shaft (4), and a driven gear (7) is meshed and rotatably connected to the outer side of the drive gear (5).

3. The external thread tapping die according to claim 1, characterized in that: The support ring (8) is sleeved on the outside of the driven gear (7). The support ring (8) has a circular slot. A fixing pin (9) is spirally connected inside the circular slot of the support ring (8). The other end of the fixing pin (9) is threaded to the processing table (13). The other end of the connecting pin (10) is fixedly connected to the right side of the processing table (13).

4. The external thread tapping die according to claim 2, characterized in that: A fixing seat (6) is sleeved on the left side of the rotating shaft (4), and the bottom end of the fixing seat (6) is fixedly connected to the top end of the mold frame (1).

5. The external thread tapping die according to claim 4, characterized in that: The top of the mold frame (1) is fixedly connected to a support frame (17). The support frame (17) has pulley grooves inside and on both sides. A rotating roller (18) is rotatably connected inside the pulley groove of the support frame (17). The outer side of the processing table (13) is rotatably set inside the rotating roller (18).

6. The external thread tapping die according to claim 5, characterized in that: The top of the mold frame (1) is fixedly connected to a limiting seat (20). A rotating tension ring (14) is rotatably arranged inside the top of the limiting seat (20). An extension rod (16) is fixedly connected to the top of the rotating tension ring (14). An elastic collar (15) is rotatably arranged inside the rotating tension ring (14). The outer side of the automobile pipe (19) is slidably arranged inside the elastic collar (15).

7. The external thread tapping die according to claim 6, characterized in that: The outer side of the automotive pipe (19) passes through the interior of the machining table (13) and the support ring (8), and the rightmost side of the automotive pipe (19) is located inside the three sets of taps (11).

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