Extrusion screw tap convenient for chip removal

Abstract

An extrusion screw tap facilitating chip removal relates to the technical field of extrusion screw taps and comprises an extrusion screw tap body, an air outlet is formed in the outer surface of the extrusion screw tap body, a protective shell is arranged in the extrusion screw tap body, and the protective shell is rotationally connected with the extrusion screw tap body through a bearing. The top of the protective shell is connected with a bevel gear set, the right side of the bevel gear set is connected with a handle, a cavity is formed in the top end of the interior of the extrusion screw tap body, an air bag is arranged in the cavity, and a pipeline is arranged at the bottom end of the air bag. Through arrangement of a nut, a connecting rod, a bidirectional lead screw, a clamping block, a connecting block and a clamping groove, the nut is rotated to drive the bidirectional lead screw to rotate, the clamping block in threaded connection with the outer surface of the bidirectional lead screw can move left and right, and the clamping block and the clamping groove form a clamping structure; and therefore, the purpose of conveniently and quickly mounting the extrusion screw tap body and the connecting block is achieved.

Description

Technical Field

[0001] This utility model relates to the field of extrusion tap technology, specifically to an extrusion tap that facilitates chip removal. Background Technology

[0002] Extrusion taps are a new type of threading tool that utilizes the principle of plastic deformation in metals to machine internal threads. Their shape is characterized by the absence of chip grooves, only oil grooves. Most are titanium-plated extrusion taps, specifically designed for machining threads on relatively thin soft metals. Extrusion taps are generally used on tapping machines, drilling machines, lathes, milling machines, and machining centers to machine threads on relatively thin soft metals. When using them, the size of the hole must be selected according to the required precision to extrude high-precision, high-quality threads. However, existing extrusion taps have some shortcomings, such as:

[0003] Publication No.: CN220523013U A chip-removing screw that is easy to install. The device uses the cooperation between the threaded rod, tapping part, drill rod, chip removal groove, and spiral groove to operate. After the drill rod is installed in a predetermined position, the screw rod is rotated by the nut, which in turn drives the drill rod to rotate. During the rotation of the drill rod inside the workpiece, the metal chips, oxide scale and impurities generated will enter the chip removal groove. Since the chip removal groove is connected to the spiral groove through the guide groove, after the screw rod is continuously rotated, the metal chips, oxide scale and impurities will enter the spiral groove after being squeezed, thus reducing the resistance generated during the tapping process.

[0004] However, during the extrusion tapping process, metal chips, oxide scale, or impurities may be generated on the metal surface due to plastic deformation. These substances adhere to the tap surface and affect the machining accuracy and service life. For example, chips embedded in the thread groove can cause dimensional deviations. Metal chips, surface oxide scale, and particulate contaminants mixed in the machining environment generated during extrusion machining can exacerbate friction and wear. Although extrusion taps do not produce metal chips, oxide scale, and impurities as in traditional cutting, the adhering impurities during machining still need to be cleaned. Existing technologies lack efficient cleaning mechanisms, resulting in high tap maintenance costs and insufficient accuracy stability. Moreover, existing extrusion taps usually rely on manual wiping to clean impurities, which is inefficient and easily damages the surface. This application fills this technological gap by achieving automated cleaning through a pneumatic cleaning structure. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an extrusion tap that facilitates chip removal.

[0006] The objective of this utility model is achieved through the following technical solution: a squeezing tap for easy chip removal, comprising a squeezing tap body, an air vent on the outer surface of the squeezing tap body, and a protective shell inside the squeezing tap body, the protective shell being rotatably connected to the squeezing tap body via a bearing, and the protective shell having a vent that flows through the air vent, a bevel gear set connected to the top of the protective shell, and a handle connected to the right side of the bevel gear set, a cavity at the top of the squeezing tap body, an air bladder inside the cavity, a pipe at the bottom of the air bladder, a piston pump body on the outer side of the squeezing tap body, an electric telescopic rod installed inside the piston pump body, a piston rod connected to one end of the electric telescopic rod, and a piston plate connected to one end of the piston rod, and a one-way valve inside the piston pump body.

[0007] By rotating the handle through the vent, protective shell, air vent, and piston pump body, the air vent of the protective shell is aligned with the vent of the extrusion tap body. The electric telescopic rod is then activated, which pushes the piston rod and piston plate to move. A hose connects the piston pump body and the air bladder, allowing air to be injected into the air bladder within the cavity. When air is discharged from the piston pump body, the one-way valve at the air inlet of the piston pump body closes, allowing air to be discharged from the outlet, increasing the airflow velocity. The airflow in the air bladder then passes through the pipe to quickly clean metal chips, oxide scale, and impurities from the extrusion tap body.

[0008] As a preferred technical solution of this utility model, a connecting frame is welded to the top of the extrusion tap body, and a placement cavity is opened inside the connecting frame.

[0009] The above technical solution enables the bidirectional lead screw inside the placement cavity to operate.

[0010] As a preferred embodiment of this utility model, the internal bearing of the placement cavity is connected to a bidirectional lead screw, and one end of the bidirectional lead screw is connected to a nut.

[0011] The above technical solution enables the nut to rotate, which in turn drives the bidirectional lead screw to rotate inside the placement cavity.

[0012] As a preferred embodiment of this utility model, the external thread of the bidirectional lead screw is connected with a locking block.

[0013] The above technical solution enables two locking blocks to move simultaneously toward the middle or both sides on the outer surface of the bidirectional lead screw when the lead screw rotates.

[0014] As a preferred embodiment of this utility model, the locking block is symmetrically arranged about the central axis of the bidirectional lead screw.

[0015] The above technical solution enables the two locking blocks to move simultaneously toward the middle or both sides on the outer surface of the bidirectional lead screw when it rotates.

[0016] As a preferred embodiment of this utility model, a connecting block is snapped into the top of the connecting frame, and a slot is provided inside the connecting block.

[0017] The above technical solution enables the slot and the block to quickly engage, allowing for rapid installation and disassembly of the connecting frame and the connecting block in the later stages.

[0018] The beneficial effects of this utility model are as follows: By incorporating the extrusion tap body, air outlet, protective shell, ventilation hole, piston pump body, and electric telescopic rod, when chip removal is required after the extrusion tap body has finished operation, the handle can be turned to rotate the bevel gear set and the protective shell, aligning the ventilation hole of the protective shell with the air outlet of the extrusion tap body. Then, the electric telescopic rod is activated, pushing the piston rod and piston plate. A flexible hose connects the piston pump body and the air bladder, allowing air to be injected into the air bladder within the cavity. This allows air to be injected into the interior of the protective shell, and the air then travels from the ventilation hole to the air outlet, achieving rapid cleaning of impurities adhering to the surface of the extrusion tap. This prevents impurities from affecting machining accuracy and tap life. By replacing the traditional mechanical chip removal structure with airflow cleaning, the problem of reduced tap strength caused by chip removal grooves is avoided. Simultaneously, the maintenance process is simplified, and machining stability is improved.

[0019] By using a nut, connecting rod, double-ended lead screw, locking block, connecting block, and locking groove, rotating the nut causes the double-ended lead screw to rotate. The locking block, which is threaded on the outer surface of the double-ended lead screw, can move left and right, so that the locking block and locking groove form a locking structure, thereby facilitating the quick installation of the extrusion tap body and the connecting block. Attached Figure Description

[0020] Figure 1 This is a front cross-sectional structural schematic diagram of the present invention;

[0021] Figure 2 This is a front view structural diagram of the present invention;

[0022] Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 This is the utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the elevation structure of this utility model.

[0025] The attached figures are labeled as follows: 1. Extrusion tap body; 2. Vent hole; 3. Protective shell; 4. Vent hole; 5. Bevel gear set; 6. Handle; 7. Cavity; 8. Airbag; 9. Pipe; 10. Piston pump body; 11. Electric telescopic rod; 12. Piston rod; 13. Piston plate; 14. One-way valve; 15. Connecting frame; 16. Placement cavity; 17. Two-way screw; 18. Nut; 19. Locking block; 20. Connecting block; 21. Slot. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0027] like Figure 1-5 As shown, a squeegee tap that facilitates chip removal includes a squeegee tap body 1. The outer surface of the squeegee tap body 1 is provided with an air outlet 2, and the inside of the squeegee tap body 1 is provided with a protective shell 3. The protective shell 3 is rotatably connected to the squeegee tap body 1 through a bearing, and the protective shell 3 is provided with a vent hole 4 that flows through the air outlet 2. The top of the protective shell 3 is connected to a bevel gear set 5, and the right side of the bevel gear set 5 is connected to a handle 6. The top of the inside of the squeegee tap body 1 is provided with a cavity 7, and the cavity 7 is provided with an air bladder 8. The bottom of the air bladder 8 is provided with a pipe 9. The outside of the squeegee tap body 1 is provided with a piston pump body 10, and the inside of the piston pump body 10 is equipped with an electric telescopic rod 11. One end of the electric telescopic rod (11) is connected to a piston rod 12, and one end of the piston rod 12 is connected to a piston plate 13. The inside of the piston pump body 10 is provided with a one-way valve 14.

[0028] By rotating the handle 6 through the air outlet 2, protective shell 3, vent 4, and piston pump body 10, the vent 4 of the protective shell 3 is aligned with the air outlet 2 of the extrusion tap body 1. The electric telescopic rod 11 is activated, which pushes the piston rod 12 and piston plate 13 to move. A hose is connected between the piston pump body 10 and the air bag 8, allowing air to be injected into the air bag 8 in the cavity 7. When the air is discharged from the piston pump body 10, the one-way valve 14 at the air inlet of the piston pump body 10 is closed, and the air can be discharged from the outlet, increasing the airflow velocity. Then, the airflow in the air bag 8 can quickly clean the metal chips, oxide scale, and impurities on the extrusion tap body 1 through the pipe 9.

[0029] A connecting frame 15 is welded to the top of the extrusion tap body 1, and a placement cavity 16 is opened inside the connecting frame 15, and a bidirectional screw 17 runs inside the placement cavity 16.

[0030] The internal bearing of the placement cavity 16 is connected to a double-acting lead screw 17, and one end of the double-acting lead screw 17 is connected to a nut 18. When the nut 18 rotates, it drives the double-acting lead screw 17 to rotate inside the placement cavity 16.

[0031] The double-acting lead screw 17 is externally threaded with a locking block 19. When the double-acting lead screw 17 rotates, the two locking blocks 19 move simultaneously toward the middle or both sides on the outer surface of the double-acting lead screw 17.

[0032] The locking blocks 19 are symmetrically arranged about the central axis of the bidirectional lead screw 17. When the bidirectional lead screw 17 rotates, it can drive the two locking blocks 19 to move simultaneously towards the middle or both sides on the outer surface of the bidirectional lead screw 17.

[0033] The top of the connecting frame 15 is snapped with a connecting block 20, and the connecting block 20 has a slot 21 inside. The slot 21 and the slot 19 are snapped together quickly, so that the connecting frame 15 and the connecting block 20 can be quickly installed and disassembled later.

[0034] Working principle: When chip removal is required after the extrusion tap body 1 has finished operating, the handle 6 can be turned, causing the bevel gear set 5 and the protective shell 3 to rotate. This aligns the vent 4 of the protective shell 3 with the air outlet 2 of the extrusion tap body 1. Then, the electric telescopic rod 11 is activated, pushing the piston rod 12 and piston plate 13 to move. A hose connects the piston pump body 10 and the air bladder 8, allowing air to be injected into the air bladder 8 inside the cavity 7. The pipe 9 then injects air into the interior of the protective shell 3, and the air reaches the air outlet 2 through the vent 4. The airflow is then sprayed onto the surface of the extrusion tap body 1 through the air outlet 2, using air pressure to remove attached metal chips, oxide scale, and impurities, preventing their accumulation from affecting thread machining accuracy. When the vent 4 and air outlet 2 of the protective shell 3 are aligned, the direction of airflow can be controlled, improving cleaning efficiency.

[0035] When the extrusion tap body 1 needs to be quickly installed with the connecting block 20, rotate the nut 18 so that the nut 18 drives the bidirectional screw 17 to rotate. The locking block 19 connected to the thread on the outer surface of the bidirectional screw 17 can move left and right, so that the locking block 19 and the locking groove 21 form a locking structure, thereby facilitating the quick installation of the extrusion tap body 1 and the connecting block 20.

[0036] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A facilitating chip removal extrusion tap, characterized in that: The device includes a tap body (1), the outer surface of which has an air vent (2), and the inside of which is a protective shell (3). The protective shell (3) is rotatably connected to the tap body (1) via a bearing, and the protective shell (3) has a vent (4) that communicates with the air vent (2). A bevel gear set (5) is connected to the top of the protective shell (3), and a handle (6) is connected to the right side of the bevel gear set (5). The inside of the tap body (1) The top of the tap has a cavity (7) and an air bladder (8) inside the cavity (7). The bottom of the air bladder (8) has a pipe (9). The outside of the tap body (1) has a piston pump body (10) and an electric telescopic rod (11) is installed inside the piston pump body (10). One end of the electric telescopic rod (11) is connected to a piston rod (12) and one end of the piston rod (12) is connected to a piston plate (13). The piston pump body (10) has a one-way valve (14) inside.

2. The extrusion tap for easy chip removal according to claim 1, characterized in that: The top of the extrusion tap body (1) is welded with a connecting frame (15), and the connecting frame (15) has a placement cavity (16) inside.

3. The extrusion tap for easy chip removal according to claim 2, characterized in that: The internal bearing of the placement cavity (16) is connected to a two-way lead screw (17), and one end of the two-way lead screw (17) is connected to a nut (18).

4. The extrusion tap for easy chip removal according to claim 3, characterized in that: The external thread of the bidirectional lead screw (17) is connected to a locking block (19).

5. The extrusion tap for easy chip removal according to claim 4, characterized in that: The locking block (19) is symmetrically arranged about the central axis of the bidirectional lead screw (17).

6. The extrusion tap for easy chip removal according to claim 2, characterized in that: The top of the connecting frame (15) is fitted with a connecting block (20), and the connecting block (20) has a slot (21) inside.

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