A pneumatic tapping machine for thread processing

Abstract

The present application relates to tapping technical field, especially a kind of pneumatic tapping machine for thread processing, including machine case, mounting column, swing frame, joint module, telescopic part, first mounting seat, pneumatic tapping machine body, clamping assembly etc.;The top of machine case is provided with mounting column, mounting column is provided with swing frame, swing frame is provided with joint module, telescopic part is provided on joint module, the bottom of telescopic part is provided with first mounting seat, first mounting seat is provided with pneumatic tapping machine body, and tapping drill bit is detachably provided on pneumatic tapping machine body.The present application is positioned quickly and accurately by the cooperation of clamping assembly and concentric alignment mechanism, which realizes the quick and accurate positioning of tapping drill bit and workpiece bottom hole center line.Concentric alignment mechanism utilizes four arc-shaped taper plates to form conical hopper to guide into bottom hole, and then expands synchronously to tightly adhere to hole inner wall through positioning strip, thereby automatically completes concentric positioning, effectively avoids the deviation caused by manual visual alignment.

Description

Technical Field

[0001] This invention relates to the field of tapping technology, and in particular to a pneumatic tapping machine for thread processing. Background Technology

[0002] The benchtop or handheld pneumatic tapping machines currently in use are considered revolutionary equipment in the machining industry due to their high power, ease of operation, and high processing accuracy. However, pneumatic tapping machines must use high-pressure air as a power source.

[0003] Chinese Patent CN102423821B discloses a rocker arm type pneumatic tapping machine for automotive aluminum alloy wheels, comprising a tapping mechanism, an upper rocker arm, a lower rocker arm, a connecting air pipe, and a working platform. The tapping mechanism is equipped with a hand handle, a selector button, a control valve, and a tap connector. The upper and lower rocker arms are connected, and the upper rocker arm can move freely up and down and circumferentially via a control spring mounted on it and its rotation shaft. The lower rocker arm can rotate circumferentially via a rotation shaft mounted on it. In use, select the desired tap, stabilize the workpiece with your left hand, hold the hand handle with your right hand, adjust the appropriate speed, select the tap rotation direction as forward, move the tap to the desired tapping position, hold the control valve, and press down firmly. When the tap reaches the bottom of the hole, it will automatically stop. At this point, release the control valve, rotate the tap to the reverse direction, and then hold the control valve again to push the tap out, thus completing the tapping of one hole. This equipment is convenient, efficient, and easy to operate. When tapping vertically, the initial positioning can be achieved visually and with simple fixtures. However, when machining on inclined surfaces or at corners, there is often a lack of rigid connection between the workpiece and the equipment. Relying on manual hand control of the feed direction can easily lead to misalignment between the tap axis and the center line of the bottom hole, resulting in increased tapping torque. In severe cases, it can even cause channel offset or tap breakage. Therefore, it is necessary to design a pneumatic tapping machine for thread processing to solve the above problems. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a pneumatic tapping machine for thread processing.

[0005] The technical implementation scheme of the present invention is as follows: a pneumatic tapping machine for thread processing, comprising: a housing, a mounting column provided on the top of the housing, and a swing frame provided on the mounting column; characterized in that it further comprises: a joint module, a joint module provided on the swing frame, and a telescopic component provided on the joint module; a pneumatic tapping machine body, a first mounting seat provided at the bottom of the telescopic component, and a pneumatic tapping machine body provided on the first mounting seat; a clamping assembly, a clamping assembly for fixing the workpiece provided on the outer wall of the pneumatic tapping machine body; and a concentric alignment mechanism, a concentric alignment mechanism provided on the clamping assembly for aligning the tapping drill bit of the pneumatic tapping machine body and the circular hole of the workpiece.

[0006] Optionally, the telescopic component consists of a sleeve and a push rod, which slide together. The sleeve of the telescopic component is fixedly connected to the output end of the joint module.

[0007] Optionally, the clamping assembly includes: a second mounting base, symmetrically arranged on the lower part of the outer side wall of the pneumatic tapping machine body, with a guide rod vertically sliding on the second mounting base; a fixed base, with a fixed base at the bottom of each guide rod, and a first elastic element sleeved on the guide rod, one end of the first elastic element connected to the second mounting base and the other end connected to the top of the fixed base; a swing base, rotatably mounted on the fixed base via a rotating shaft; a rectangular frame, with a rectangular frame at the bottom of the fixed base; a drive self-locking assembly, with a drive self-locking assembly on both the swing base and the fixed base; a clamping frame, with two clamping frames rotatably mounted on the rectangular frame via a rotating shaft, and the two clamping frames are symmetrically arranged; a fixed block, with a fixed block at the top of each clamping frame; a first electric push rod, with a first electric push rod rotatably arranged on both sides of the rectangular frame, and the push rod of the first electric push rod rotatably connected to the adjacent fixed block; and an electromagnetic chuck, with an electromagnetic chuck at the bottom of each clamping frame.

[0008] Optionally, the self-locking drive assembly includes: a worm gear, a rectangular slot is provided at the bottom of the fixed base, and a worm gear is installed at the shaft position located in the rectangular slot; a worm, a rectangular slot is provided at the top of the swing base, and a worm is arranged laterally and rotatably in the rectangular slot of the swing base, and the worm meshes with the adjacent worm gear; and a rotary motor, a rotary motor is provided on the swing base, and the output shaft of the rotary motor is connected to the rear end of the worm through a coupling.

[0009] Optionally, the concentric alignment mechanism includes: a rectangular frame, which is provided between two fixed seats, with a second electric push rod provided at each of the four corners of the bottom of the rectangular frame; a straight slide rail, with a straight slide rail horizontally provided at the bottom of the push rod of the second electric push rod, and all four straight slide rails facing the center of the rectangular frame; a straight slider, with a straight slider slidably provided on the straight slide rail; a third electric push rod, with a third electric push rod provided on the straight slide rail, and the push rod of the third electric push rod connected to the side of the straight slider away from the second electric push rod; an arc-shaped cone plate, with an arc-shaped cone plate provided on the side of the straight slider away from the second electric push rod, and the four arc-shaped cone plates contacting each other to form a cone-shaped bucket; and a positioning strip, with a positioning strip provided at the bottom of the arc-shaped cone plate.

[0010] Optionally, it also includes: a lighting fixture, wherein a lighting fixture is provided on the top of the mounting column.

[0011] Optionally, buffer pads are provided between the straight slide rails.

[0012] Optionally, the lighting lamp is an angle-adjustable LED lamp, and a ball joint is provided at the bottom of the lighting lamp, which is fixed to the top of the mounting column.

[0013] Compared with the prior art, the present invention has the following advantages: 1. This invention achieves rapid and precise positioning of the tapping drill bit and the center line of the workpiece's bottom hole through the coordinated operation of the clamping assembly and the concentric alignment mechanism. The concentric alignment mechanism utilizes four arc-shaped conical plates to converge and form a conical bucket to guide the drill bit into the bottom hole. Then, a positioning strip expands outwards synchronously to fit tightly against the inner wall of the hole, thereby automatically completing concentric positioning. This effectively avoids deviations caused by manual visual alignment and improves the positional accuracy of thread processing. Simultaneously, the electromagnetic chuck in the clamping assembly can directly adhere to the workpiece surface after positioning, forming a rigid and fixed connection between the pneumatic tapping machine body and the workpiece. This replaces manual hand-held operation, significantly reducing the operator's labor intensity and minimizing problems such as tapping deviation, thread damage, or tap breakage caused by hand-held shaking.

[0014] 2. This invention, through the cooperation of the self-locking drive assembly and the first electric push rod, enables the clamping assembly to adapt to various complex working conditions such as horizontal surfaces, inclined surfaces, and corners. The worm gear transmission in the self-locking drive assembly has a reverse self-locking characteristic, which can reliably lock after adjusting the angle of the swing seat, ensuring stable contact between the electromagnetic chuck and the inclined surface; while the first electric push rod can drive the left and right clamping frames to swing independently around the rotation axis, so that the electromagnetic chuck can simultaneously contact the two side walls at the corner, thereby achieving firm adsorption even on complex surfaces. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the installation structure of the clamping component of the present invention.

[0017] Figure 3 This is a partial structural schematic diagram of the clamping component of the present invention.

[0018] Figure 4 This is a bottom view of the clamping assembly of the present invention.

[0019] Figure 5 This is a schematic diagram of the installation structure of the self-locking drive component of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the concentric alignment mechanism of the present invention.

[0021] Figure 7 This is a partial three-dimensional structural schematic diagram of the concentric alignment mechanism of the present invention.

[0022] The components in the attached diagram are labeled as follows: 1: Chassis, 2: Mounting column, 3: Swinging frame, 4: Joint module, 5: Telescopic component, 6: First mounting seat, 7: Pneumatic tapping machine body, 8: Clamping assembly, 81: Second mounting seat, 82: Guide rod, 83: Fixed seat, 84: First elastic component, 85: Rotating shaft, 86: Swinging seat, 87: Rectangular frame, 88: Drive self-locking assembly, 881: Worm gear, 882: Worm, 883: Rotary motor, 89: Rotating shaft, 810: Clamping frame, 811: Fixed block, 812: First electric push rod, 813: Electromagnetic chuck, 9: Concentric alignment mechanism, 91: Rectangular frame, 92: Second electric push rod, 93: Straight slide rail, 94: Straight slider, 95: Third electric push rod, 96: Arc-shaped cone plate, 97: Positioning strip, 10: Lighting lamp. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example: Figure 1 As shown, a pneumatic tapping machine for thread processing includes a housing 1, a mounting column 2, a swing frame 3, a joint module 4, a telescopic component 5, a first mounting base 6, a pneumatic tapping machine body 7, a clamping assembly 8, a concentric alignment mechanism 9, and a lighting lamp 10. The mounting column 2 is bolted to the rear left side of the top of the housing 1. The swing frame 3 is mounted on the mounting column 2, and the joint module 4 is mounted on the swing frame 3. The swing frame 3 consists of a lower rocker arm and an upper rocker arm. One end of the lower rocker arm is fitted onto the mounting column 2 and can rotate horizontally around the axis of the mounting column 2. The other end of the lower rocker arm is connected to one end of the upper rocker arm via a vertical shaft. The upper rocker arm can swing horizontally around this vertical shaft. The upper rocker arm consists of two connecting rods and a mounting housing. The two connecting rods are arranged in parallel, and both ends of each connecting rod are mounted on the mounting housing via a horizontal shaft. Specifically, the two connecting rods... One end of the upper rocker arm is rotatably connected to the mounting housing at the end of the lower rocker arm via a horizontal axis, and the other end of the two connecting rods is rotatably connected to the mounting housing on the side of the joint module 4 via a horizontal axis. Since the two connecting rods and the mounting housings at both ends together form a parallelogram linkage mechanism, the upper rocker arm can swing horizontally around the vertical axis and also swing up and down through the rotation of the two connecting rods around the horizontal axis. The joint module 4 is provided with a telescopic component 5, which consists of a sleeve and a push rod. The sleeve and the push rod are slidably engaged. The sleeve of the telescopic component 5 is fixedly connected to the output end of the joint module 4. The push rod of the telescopic component 5 extends downward in the vertical direction. The bottom of the push rod of the telescopic component 5 is fixedly mounted with a first mounting seat 6 by bolts. The first mounting seat 6 is provided with a pneumatic tapping machine body 7. The outer wall of the pneumatic tapping machine body 7 is provided with a clamping assembly 8 for fixing the workpiece.

[0025] like Figures 2-5As shown, the clamping assembly 8 includes a second mounting base 81, a guide rod 82, a fixed base 83, a first elastic element 84, a rotating shaft 85, a swing seat 86, a rectangular frame 87, a drive self-locking assembly 88, a rotating shaft 89, a clamping frame 810, a fixing block 811, a first electric push rod 812, and an electromagnetic chuck 813. The second mounting base 81 is symmetrically arranged on the lower part of the outer side wall of the pneumatic tapping machine body 7. A guide rod 82 is vertically slidably mounted on the second mounting base 81. A fixed base 83 is provided at the bottom of each guide rod 82. A first elastic element 84 is sleeved on the guide rod 82. One end of the first elastic element 84 is connected to the second mounting base 81, and the other end is connected to the top of the fixed base 83. The swing seat 86 is rotatably mounted on the fixed base 83 via the rotating shaft 85. The swing seat 86 can swing relative to the fixed seat 83 around the axis of the rotating shaft 85. The bottom of the fixed seat 83 is provided with a rectangular frame 87. Both the swing seat 86 and the fixed seat 83 are provided with a drive self-locking component 88. The drive self-locking component 88 is used to drive the swing seat 86 to rotate relative to the fixed seat 83 and self-lock after rotating into position. Both clamping frames 810 are rotatably mounted on the rectangular frame 87 through the rotating shaft 89. The two clamping frames 810 are symmetrically arranged on the left and right. The top of each clamping frame 810 is provided with a fixing block 811. The rectangular frame 87 is rotatably provided with a first electric push rod 812 on the left and right. The push rod of the first electric push rod 812 is rotatably connected to the adjacent fixing block 811. The bottom of each clamping frame 810 is provided with an electromagnetic chuck 813.

[0026] like Figures 1-5 As shown, the self-locking drive assembly 88 includes a worm gear 881, a worm 882, and a rotary motor 883. A rectangular slot is formed at the bottom of the fixed base 83, through which a rotating shaft 85 passes. The worm gear 881 is fixedly mounted on the rotating shaft 85 within the rectangular slot via a flat key. A rectangular slot is formed at the top of the swing base 86, within which the worm 882 is laterally rotatably mounted. The worm 882 meshes with the adjacent worm gear 881. The rotary motor 883 is mounted on the swing base 86, and its output shaft is connected to the worm 882 via a coupling. The rear end is connected to the clamping assembly 8, which is equipped with a concentric alignment mechanism 9 that can align the tapping drill bit of the pneumatic tapping machine body 7 with the workpiece's circular hole. The top of the mounting column 2 is equipped with a lighting lamp 10, which is an angle-adjustable LED lamp. The bottom of the lighting lamp 10 is equipped with a ball joint, which is fixed to the top of the mounting column 2. The lighting lamp 10 can be adjusted to any angle through the ball joint. The ball joint is equipped with a locking screw to fix the deflection posture of the lighting lamp 10. The illumination direction of the lighting lamp 10 is towards the workpiece position below the tapping drill bit.

[0027] like Figure 2 , Figure 3 and Figure 6As shown, the concentric alignment mechanism 9 includes a rectangular frame 91, a second electric push rod 92, a straight slide rail 93, a straight slider 94, a third electric push rod 95, an arc-shaped cone plate 96, and a positioning bar 97. The rectangular frame 91 is arranged between the two fixed seats 83. The second electric push rod 92 is arranged at each of the four corners of the bottom of the rectangular frame 91. The bottom of the push rod of the second electric push rod 92 is horizontally arranged with a straight slide rail 93. A buffer pad is arranged between the straight slide rails 93. The buffer pad is made of polyurethane elastic material and is used to buffer the impact when the concentric alignment mechanism 9 presses against the workpiece downwards. Four straight slide rails 93 are all oriented towards the center of the rectangular frame 87. A straight slide block 94 is slidably mounted on the straight slide rail 93. A third electric push rod 95 is mounted on the straight slide rail 93. The push rod of the third electric push rod 95 is connected to the side of the straight slide block 94 away from the second electric push rod 92. An arc-shaped cone plate 96 is mounted on the side of the straight slide block 94 away from the second electric push rod 92. The four arc-shaped cone plates 96 contact and cooperate to form a cone-shaped bucket. A positioning strip 97 is mounted at the bottom of the arc-shaped cone plate 96. The outer surface of the positioning strip 97 is an arc-shaped surface that can fit against the inner wall of the bottom hole of the workpiece.

[0028] The first specific method of using this invention: When using this device for tapping operations, the pneumatic tapping machine body 7 is first manually held and adjusted at multiple angles using the swing frame 3 and joint module 4. The lower rocker arm in the swing frame 3 rotates horizontally around the mounting column 2, while the upper rocker arm swings horizontally around its vertical axis and can also swing up and down around the horizontal axis. The joint module 4 provides rotational freedom at each joint, and the telescopic component 5 provides vertical telescopic freedom, allowing the pneumatic tapping machine body 7 to achieve angle adjustments in any direction within space. The operator then moves the tapping drill bit above the hole to be processed and initially aligns the drill bit's axis with the predetermined tapping direction. Simultaneously, the lighting lamp 10 on top of the mounting column 2 provides supplementary lighting to assist the operator in visual alignment.

[0029] When the circular hole on the workpiece is on a horizontal plane and needs to be tapped vertically, the clamping assembly 8 does not need to be adjusted, nor does it need to be adjusted, either the drive self-locking assembly 88 or the first electric push rod 812. Then, the manual operator continues to move the pneumatic tapping machine body 7 downwards, causing the entire clamping assembly 8 to move downwards. Simultaneously, the second electric push rod 92 extends synchronously, pushing the straight slide rails 93 below it downwards. At the same time, the third electric push rod 95 pushes the straight slide block 94 towards the center of the rectangular frame 87, causing the four arc-shaped conical plates 96 to move towards the center and contact the fitting. The components are combined to form a complete conical bucket. Then, the pneumatic tapping machine body 7 is manually moved downwards so that the positioning strip 97 at the bottom of the combined conical bucket enters the round hole of the workpiece. Subsequently, the third electric push rod 95 is controlled to retract, pulling the straight slide block 94 to slide away from the center along the straight slide rail 93, so that the positioning strip 97 contacts the inner wall of the bottom hole. By having the four positioning strips 97 simultaneously adhere to the inner wall of the hole, the concentric and precise positioning of the tapping drill bit's central axis and the center line of the bottom hole is completed. Since the workpiece surface is horizontal, the adsorption surface of the electromagnetic chuck 813 naturally adheres to the workpiece surface. By directly energizing the electromagnetic chucks 813, the two electromagnetic chucks 813 are firmly attached to the surface of the horizontal workpiece, thus forming a rigid fixed connection between the pneumatic tapping machine body 7 and the workpiece, replacing manual hand-held stability. After the electromagnetic chucks 813 are reliably attached and fixed, the third electric push rod 95 extends again, pushing the straight slider 94 to slide towards the center, causing the four arc-shaped cone plates 96 to move back towards the center and combine into a cone-shaped bucket. The second electric push rod 92 retracts, driving the straight slide rail 93, the straight slider 94, and the combined cone-shaped bucket to move upward as a whole, causing the cone-shaped bucket to be pulled out of the bottom hole. Then, the third electric push rod 95 retracts again, pulling the straight slider 94 to slide away from the center, causing the four arc-shaped cone plates 96 to separate and disperse, completely exposing the central channel for the tapping drill bit to pass through. At this time, tapping operations can be performed.

[0030] The second specific method of using the present invention: When a circular hole on a workpiece is located on an inclined plane, but tapping is required in a vertical direction, the tapping drill bit must remain vertical, while the workpiece surface is inclined. In this case, if the electromagnetic chuck 813 at the bottom of the clamping assembly 8 maintains its original posture, it cannot fit against the inclined plane. Therefore, it is necessary to directly control the drive self-locking assembly 88 to tilt the clamping frame 810, so that the contact angle between the clamping frame 810 and the electromagnetic chuck 813 matches the angle of the inclined plane. The rotary motor 883 is started, and it drives the worm 882 in the rectangular slot of the swing seat 86 to rotate via a coupling. The worm 882 meshes with the worm wheel 881 on the rotating shaft 85 in the rectangular slot of the fixed seat 83, causing the rotating shaft 85 and the swing seat 86 to rotate slowly relative to the fixed seat 83, thereby precisely adjusting the angle between the swing seat 86 and the fixed seat 83. Since the rectangular frame 87, clamping frame 810, etc., all move together with the swing seat 86, the electromagnetic chuck 813 at the bottom of the clamping frame 810 also tilts accordingly. This ultimately aligns the suction surface of the electromagnetic chuck 813 with the angle of the workpiece's inclined surface. Because the worm gear 881 and worm 882 have a reverse self-locking characteristic, the rotary motor 883 stops after the angle is adjusted, and the worm 882 and worm gear 881 achieve self-locking, locking the angle of the swing seat 86. At this time, the first electric push rod 812 does not move, and the clamping frame 810 does not swing independently around the rotation axis 89. Instead, it tilts as a whole with the swing seat 86 until it reaches the correct position. Subsequently, the electromagnetic chuck 813 is energized, tightly adsorbing the bottom of the clamping frame 810, which has been adjusted and locked, onto the inclined surface of the workpiece, thus forming a rigid fixed connection between the pneumatic tapping machine body 7 and the workpiece. Then, in the manner described above, the arc-shaped cone plate 96 of the concentric alignment mechanism 9 is brought together, pulled up, and spread out to expose the central channel. The pneumatic tapping machine body 7 drives the tapping drill bit to complete the tapping of the vertical hole at the inclined surface in the vertical direction.

[0031] The third specific method of using this invention: When a circular hole on a workpiece is located at a corner, and there are two intersecting or adjacent sidewalls near the hole to be tapped, simply tilting the swing seat 86 as a whole may not be enough to simultaneously fit both sidewalls. In this case, after the concentric alignment mechanism 9 completes the concentric positioning of the tapping drill bit and the center line of the bottom hole, the first electric push rods 812 on the left and right sides of the rectangular frame 87 are controlled to move according to the actual angles of the two sidewalls at the workpiece corner. The extension or retraction of the first electric push rod 812 drives the adjacent fixed block 811 to move, and the fixed block 811 drives the clamping frame 810 to swing around the rotation axis 89. Since the two clamping frames 810 are symmetrically arranged and rotatably mounted on the rectangular frame 87 via their respective rotation axes 89, the two clamping frames 810 can be adjusted to an angle suitable for the two sidewalls at the workpiece corner. After adjustment, the electromagnetic chucks 813 at the bottom of the two clamping frames 810 respectively fit against the two sidewalls at the workpiece corner. Subsequently, the electromagnetic chuck 813 is energized, firmly adhering the clamping assembly 8 to the two side walls at the corner of the workpiece, thus forming a rigid fixed connection between the pneumatic tapping machine body 7 and the workpiece. At this time, the drive self-locking assembly 88 may not operate, or may only be used as an auxiliary locking mechanism; the main angle adjustment is completed by the first electric push rod 812, and then, in the aforementioned manner, the arc-shaped cone plate 96 of the concentric alignment mechanism 9 is brought together, pulled up, and spread out to expose the central channel. The pneumatic tapping machine body 7 then drives the tapping drill bit to complete the tapping operation of the round hole at the corner.

[0032] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A pneumatic tapping machine for thread processing, characterized in that, include: The chassis (1) has a mounting post (2) on its top and a swing frame (3) on its mounting post (2). The chassis (1) is characterized by further including: Joint module (4), the swing frame (3) is provided with joint module (4), and telescopic component (5) is provided on joint module (4); The pneumatic tapping machine body (7) has a first mounting base (6) at the bottom of the telescopic component (5), and the pneumatic tapping machine body (7) is mounted on the first mounting base (6). Clamping assembly (8): The outer wall of the pneumatic tapping machine body (7) is provided with a clamping assembly (8) for fixing the workpiece. The concentric alignment mechanism (9) is provided on the clamping assembly (8) to align the tapping drill bit of the pneumatic tapping machine body (7) with the workpiece round hole.

2. The pneumatic tapping machine for thread processing according to claim 1, characterized in that, The telescopic component (5) consists of a sleeve and a push rod. The sleeve and push rod are slidably connected. The sleeve of the telescopic component (5) is fixedly connected to the output end of the joint module (4).

3. The pneumatic tapping machine for thread processing according to claim 1, characterized in that, The clamping assembly (8) includes: The second mounting base (81) is symmetrically provided on the lower part of the outer side wall of the pneumatic tapping machine body (7), and a guide rod (82) is vertically slidably provided on the second mounting base (81). The bottom of the fixed seat (83) and the guide rod (82) are both provided with fixed seats (83). The guide rod (82) is sleeved with a first elastic element (84). One end of the first elastic element (84) is connected to the second mounting seat (81), and the other end is connected to the top of the fixed seat (83). The swing seat (86) is rotatably mounted on the fixed seat (83) via the rotating shaft (85); A rectangular frame (87) is provided at the bottom of the fixing base (83); A self-locking drive assembly (88) is provided on the drive self-locking assembly (88), the swing seat (86) and the fixed seat (83). The clamping frame (810) is rotatably mounted on the rectangular frame (87) via a rotating shaft (89), and the two clamping frames (810) are symmetrically arranged. The top of both the fixing block (811) and the clamping frame (810) is provided with a fixing block (811); The first electric push rod (812) is rotatably mounted on both sides of the rectangular frame (87), and the push rod of the first electric push rod (812) is rotatably connected to the nearby fixed block (811). Electromagnetic chucks (813) are provided at the bottom of both the clamping frame (810) and the electromagnetic chucks (813).

4. A pneumatic tapping machine for thread processing according to claim 3, characterized in that, The self-locking drive assembly (88) includes: The worm gear (881) has a rectangular groove at the bottom of the fixed base (83), and the worm gear (881) is installed at the position of the rotating shaft (85) inside the rectangular groove. The worm (882) and the swing seat (86) have a rectangular groove on the top. The worm (882) is rotatably mounted in the rectangular groove of the swing seat (86). The worm (882) meshes with the nearby worm wheel (881). A rotary motor (883) is provided on a swing seat (86). The output shaft of the rotary motor (883) is connected to the rear end of the worm gear (882) through a coupling.

5. A pneumatic tapping machine for thread processing according to claim 1, characterized in that, The concentric alignment mechanism (9) includes: A rectangular frame (91) is provided between two fixed seats (83), and a second electric push rod (92) is provided at each of the four corners of the bottom of the rectangular frame (91). The bottom of the push rod of the second electric push rod (92) is provided with a straight slide rail (93), and all four straight slide rails (93) face the center of the rectangular frame (87). A straight slider (94) is slidably mounted on a straight slide rail (93). The third electric push rod (95) is provided on the straight slide rail (93). The push rod of the third electric push rod (95) is connected to the side of the straight slide block (94) away from the second electric push rod (92). The curved cone plate (96) and the straight slider (94) are both provided with curved cone plates (96) on the side away from the second electric push rod (92). The four curved cone plates (96) are in contact and cooperate to form a cone-shaped bucket. Positioning strip (97) is provided at the bottom of the arc-shaped cone plate (96).

6. A pneumatic tapping machine for thread processing according to claim 1, characterized in that it further... include: Lighting lamp (10), a lighting lamp (10) is installed on the top of the mounting column (2).

7. A pneumatic tapping machine for thread processing according to claim 5, characterized in that, A buffer pad is provided between the straight slide rails (93).

8. A pneumatic tapping machine for thread processing according to claim 6, characterized in that, The lighting lamp (10) is an angle-adjustable LED lamp. A ball joint is provided at the bottom of the lighting lamp (10), and the ball joint is fixed to the top of the mounting column (2).

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