CN110666257A

CN110666257A - C type return bend tip chasing bar

Info

Publication number: CN110666257A
Application number: CN201911056962.8A
Authority: CN
Inventors: 贾涛
Original assignee: 贾涛
Current assignee: GAOTANG Rongzhi Rongzhi Technology Service Co.,Ltd.
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-10
Anticipated expiration: 2039-10-31
Also published as: CN110666257B

Abstract

The invention relates to the field of elbow processing, in particular to a C-shaped elbow end tapping device, which comprises a workbench, a clamping assembly and a tapping assembly, wherein the clamping assembly is arranged at the top of the workbench, the tapping assembly is also arranged at the top of the workbench, the clamping assembly comprises a tail clamping mechanism and an end clamping mechanism, the tail clamping mechanism is arranged at one end of the top of the workbench, the end clamping mechanism is arranged at one side of the tail clamping mechanism, the end clamping mechanism is positioned between the tail clamping mechanism and the tapping assembly, the tapping assembly comprises a moving mechanism and two symmetrically arranged tapping mechanisms, the moving mechanism is arranged on the other side of the end clamping mechanism, and the two tapping mechanisms are arranged above the moving mechanism.

Description

C type return bend tip chasing bar

Technical Field

The invention relates to the field of bent pipe processing, in particular to a C-shaped bent pipe end tapping device.

Background

Up to now, the novel industrial revolution is fiercely developed, the efficiency of the today transmission hydraulic processing system of the novel industrial revolution can not meet the modern demand to the present market of mass production, an automatic processing is needed, the efficiency is different from semi-automatic, the semi-automatic efficiency is not as good as the full-automatic processing, but the requirement of the full-automatic processing to hardware is higher, the hardware is needed to be capable of being adapted to various occurrence conditions, and the clamp of the full-automatic hydraulic pipe bender needs to be further improved.

At present, during the return bend tapping, often need artifical many return bends to carry out mounting fixture, is carrying out the tapping to the return bend after that, like this greatly reduced work efficiency, consequently, need design one kind and can press from both sides the device of getting to different types of return bends.

Disclosure of Invention

The invention aims to provide a C-shaped elbow end tapping device, which solves the problem that the work efficiency is reduced because the elbow is manually clamped when being tapped.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a C type return bend tip chasing bar, comprises a workbench, still include clamping component and tapping subassembly, clamping component sets up in the top of workstation, the tapping subassembly also sets up in the top of workstation, clamping component includes a afterbody clamping mechanism and an end clamping mechanism, afterbody clamping mechanism sets up in the top one end of workstation, end clamping mechanism sets up in one side of afterbody clamping mechanism, and end clamping mechanism is located between afterbody clamping mechanism and the tapping subassembly, the tapping subassembly includes the tapping mechanism that a moving mechanism and two symmetries set up, moving mechanism sets up in end clamping mechanism's opposite side, two tapping mechanisms set up in moving mechanism's top.

As an optimal scheme of a C-shaped elbow end tapping device, the tail clamping mechanism is composed of a material pushing cylinder and two long shaft cylinders, one end of the workbench is provided with a supporting table for supporting the tail clamping mechanism, the material pushing cylinder is arranged on the supporting table in a horizontal state, the output direction of the material pushing cylinder is parallel to the length direction of the workbench, a first clamping portion is arranged on an output shaft of the material pushing cylinder in a horizontal state, the two long shaft cylinders are symmetrically arranged on the supporting table in a horizontal state, the output directions of the two long shaft cylinders are perpendicular to the output direction of the material pushing cylinder, and second clamping portions are arranged on output shafts of the two long shaft cylinders in a horizontal state respectively.

As a C type return bend tip chasing bar's an preferred scheme, afterbody clamping mechanism still includes a supporting seat, a support frame and two symmetries set up the stabilising arrangement in the support frame, the supporting seat sets up between brace table and tip clamping mechanism, the support frame sets up on the supporting seat, two stabilising arrangements all include first electronic lead screw slip table, first slider, the steady rest, semicolumn and two bracing pieces, first electronic lead screw slip table sets up in the inboard bottom of support frame, first slider can gliding the setting on first electronic lead screw slip table, the steady rest sets up on first slip table, the semicolumn sets up in the top of support frame, the both ends of two bracing pieces are connected with semicolumn and first slip table respectively, and the inboard top of support frame still is equipped with one and is used for the gliding fixed slot of two steady rests.

As a C type return bend tip chasing bar's an preferred scheme, tip clamping mechanism includes a support, the downward clamping device that upwards clamping device and two symmetries set up that two symmetries set up, the support sets up between supporting seat and moving mechanism, every clamping device that makes progress is by the electronic lead screw slip table of second, the second slider, telescopic cylinder and third clamping part are constituteed, the electronic lead screw slip table of second sets up in the inboard bottom of support, the second slider can be gliding sets up in the top of the electronic lead screw slip table of second, telescopic cylinder is vertical state and sets up on the second slider, the third clamping part sets up on telescopic cylinder's output shaft, and every telescopic cylinder is all fixed through a mount.

As an optimal scheme of C type return bend tip chasing bar, two clamping device all include a first movable block downwards, a vertical cylinder, two first fixing bases and two first threaded rods, two first fixing base symmetries set up in the top of support, two first threaded rod symmetries set up on two first fixing bases, first movable block can gliding setting up on two first threaded rods, vertical cylinder sets up on first movable block, the downward stretching out of the output shaft of vertical cylinder is served and is equipped with a fourth clamping part, and the tip of two first threaded rods is equipped with two first band pulleys, the cover is equipped with a first belt on the band pulley, still be equipped with a first motor on a first threaded rod.

As an optimal scheme of a C-shaped elbow end tapping device, the moving mechanism comprises a second moving block, two second fixing seats and two second threaded rods, the two second fixing seats are symmetrically arranged on the workbench, the two second threaded rods are symmetrically arranged on the two second fixing seats, the second moving block can be sleeved on the two second threaded rods in a sliding mode, a second belt wheel is sleeved on each of the two second threaded rods, a second belt is arranged on each second belt wheel, each second threaded rod is further driven by a second motor, and the second moving block moves in a stabilizing groove through a stabilizing seat.

As an optimal scheme of a C type return bend tip chasing bar, two tapping mechanisms all include a rotating electrical machines, the electronic lead screw slip table of a third, a third slider and a tapping tool bit, and the electronic lead screw slip table of third sets up on the second movable block, and the third slider slides and sets up on the electronic lead screw slip table of third, and the rotating electrical machines is fixed in on the third slider through a motor box, and the tapping tool bit is fixed in on the output shaft of rotating electrical machines.

The invention has the beneficial effects that: when an operator starts to tap the bent pipe, firstly, the material pushing cylinder drives the first clamping part to push the bent pipe forwards, then the two long shaft cylinders drive the two sides of the bent pipe of the respective second clamping part to clamp, the two semi-cylinders are respectively driven by the respective first electric screw rod sliding tables, the two semi-cylinders are clamped and adjusted according to the size of the bent pipe, then the two second clamping parts and the corresponding semi-cylinders are matched to clamp the bent pipe, when the tail part of the bent pipe is pushed, the material pushing cylinder also drives the first clamping part to clamp the bent pipe, the two upward clamping devices and the downward clamping devices finally clamp the end part of the bent pipe, the third clamping part firstly moves upwards through the telescopic cylinder, and the third clamping part also adjusts the position through the second electric screw rod sliding tables, when the two downward clamping devices clamp the bent pipe, at first the fourth clamping part carries out position adjustment through the drive of two first threaded rods, stretch out downwards through respective vertical cylinder in every fourth clamping part after that, the third clamping part is pressed from both sides the tip of return bend with the fourth clamping part mutually supported, press from both sides tight back when the return bend, the second movable block drives two tapping mechanisms and removes towards the return bend on two second threaded rods, when the tapping tool bit arrived return bend tip, every tapping tool bit carries out position adjustment through corresponding third electric screw rod slip table respectively, and final rotating electrical machines drive tapping tool bit carries out the tapping to the tip of return bend, the utility model provides an unable self-holding's problem during return bend tapping, improved work efficiency to and reduced the manpower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded perspective view of the tail clamp mechanism.

Fig. 3 is an exploded perspective view of the end clamp mechanism.

Fig. 4 is a schematic perspective view of the moving mechanism.

Fig. 5 is a schematic perspective view of the tapping mechanism.

In the figure: the device comprises a workbench 1, a tail clamping mechanism 2, an end clamping mechanism 3, a moving mechanism 4, a tapping mechanism 5, a material pushing cylinder 6, a long shaft cylinder 7, a first clamping part 8, a second clamping part 9, a support frame 10, a first electric screw rod sliding table 11, a first sliding block 12, a stabilizing frame 13, a semi-cylinder 14, a support rod 15, a support 16, a second electric screw rod sliding table 17, a second sliding block 18, a telescopic cylinder 19, a third clamping part 20, a first moving block 21, a vertical cylinder 22, a first fixed seat 23, a first threaded rod 24, a first motor 25, a second moving block 26, a second fixed seat 27, a second threaded rod 28, a second motor 29, a rotating motor 30, a third electric screw rod sliding table 31, a third sliding block 32, a tapping tool bit 33, a first belt 34, a second belt 35 and a fourth clamping part 36.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the C-shaped elbow end tapping device comprises a workbench 1, and further comprises a clamping assembly and a tapping assembly, wherein the clamping assembly is arranged at the top of the workbench 1, the tapping assembly is also arranged at the top of the workbench 1, the clamping assembly comprises a tail clamping mechanism 2 and a tip clamping mechanism 3, the tail clamping mechanism 2 is arranged at one end of the top of the workbench 1, the tip clamping mechanism 3 is arranged at one side of the tail clamping mechanism 2, the tip clamping mechanism 3 is arranged between the tail clamping mechanism 2 and the tapping assembly, the tapping assembly comprises a moving mechanism 4 and two tapping mechanisms 5 which are symmetrically arranged, the moving mechanism 4 is arranged at the other side of the tip clamping mechanism 3, and the two tapping mechanisms 5 are arranged above the moving mechanism 4. When the operating personnel began to carry out the tapping to the return bend, at first afterbody clamping mechanism 2 carried out the afterbody with the return bend and presss from both sides tightly, and tip clamping mechanism 3 presss from both sides the tip of return bend tightly afterwards, and moving mechanism 4 drives two tapping mechanisms 5 and carries out the tapping to the tip of return bend afterwards, and finally the return bend is taken out by the tapping back, operating personnel.

The tail clamping mechanism 2 is composed of a material pushing cylinder 6 and two long shaft cylinders 7, one end of the workbench 1 is provided with a supporting table for supporting the tail clamping mechanism 2, the material pushing cylinder 6 is arranged on the supporting table in a horizontal state, the output direction of the material pushing cylinder 6 is parallel to the length direction of the workbench 1, an output shaft of the material pushing cylinder 6 is provided with a first clamping portion 8 in a horizontal state, the two long shaft cylinders 7 are symmetrically arranged on the supporting table in a horizontal state, the output directions of the two long shaft cylinders 7 are perpendicular to the output direction of the material pushing cylinder 6, and output shafts of the two long shaft cylinders 7 are further provided with a second clamping portion 9 in a horizontal state respectively. When an operator starts to tap the bent pipe, the pushing cylinder 6 drives the first clamping portion 8 to push the bent pipe forwards, and then the two long shaft cylinders 7 drive the second clamping portions 9 to clamp the two sides of the bent pipe.

Afterbody clamping mechanism 2 still includes a supporting seat, a supporting frame 10 and two symmetries set up the stabilising arrangement in supporting frame 10, the supporting seat sets up between brace table and tip clamping mechanism 3, supporting frame 10 sets up on the supporting seat, two stabilising arrangement all include first electronic lead screw slip table 11, first slider 12, steady rest 13, semi-cylinder 14 and two bracing pieces 15, first electronic lead screw slip table 11 sets up in the inboard bottom of supporting frame 10, first slider 12 can gliding setting up on first electronic lead screw slip table 11, steady rest 13 sets up on first slip table, semi-cylinder 14 sets up in the top of supporting frame 10, the both ends of two bracing pieces 15 are connected with semi-cylinder 14 and first slip table respectively, and the inboard top of supporting frame 10 still is equipped with one and is used for the gliding fixed slot of two steady rest 13. When the elbow is pushed to the two semicylinders 14, the two semicylinders 14 are respectively driven by the respective first electric screw rod sliding tables 11, the two semicylinders 14 are clamped and adjusted according to the size of the elbow, then the two second clamping portions 9 and the corresponding semicylinders 14 are matched to clamp the elbow, and when the tail of the elbow is pushed, the material pushing cylinder 6 also drives the first clamping portion 8 to clamp the elbow.

Tip clamping mechanism 3 includes a support 16, the downward clamping device that upwards clamping device and two symmetries that two symmetries set up that set up, support 16 sets up between supporting seat and moving mechanism 4, every clamping device that makes progress is by the electronic lead screw slip table 17 of second, second slider 18, telescopic cylinder 19 and third clamping part 20 are constituteed, the electronic lead screw slip table 17 of second sets up in the inboard bottom of support 16, second slider 18 can gliding the setting in the top of the electronic lead screw slip table 17 of second, telescopic cylinder 19 is vertical state and sets up on second slider 18, third clamping part 20 sets up on telescopic cylinder 19's output shaft, and every telescopic cylinder 19 is all fixed through a mount. After the elbow is preliminarily fixed, the two upward clamping devices and the downward clamping devices finally clamp the end part of the elbow, the third clamping part 20 firstly moves upwards through the telescopic cylinder 19, and the third clamping part 20 also carries out position adjustment through the second electric screw rod sliding table 17.

Two clamping device all include a first movable block 21, a vertical cylinder 22, two first fixing base 23 and two first threaded rods 24, two first fixing base 23 symmetries set up in the top of support 16, two first threaded rods 24 symmetries set up on two first fixing base 23, first movable block 21 can be gliding sets up on two first threaded rods 24, vertical cylinder 22 sets up on first movable block 21, the extension that vertical cylinder 22's output shaft stretches out downwards is served and is equipped with a fourth clamping part 36, and the tip of two first threaded rods 24 is equipped with two first band pulleys, the cover is equipped with a first belt 34 on the band pulley, still be equipped with a first motor 25 on one first threaded rod 24. When the two downward clamping devices clamp the elbow, the fourth clamping portions 36 are firstly driven by the two first threaded rods 24 to adjust the position, then each fourth clamping portion 36 extends downwards through the respective vertical cylinder 22, and the third clamping portion 20 and the fourth clamping portion 36 are matched with each other to clamp the end of the elbow.

The moving mechanism 4 comprises a second moving block 26, two second fixing seats 27 and two second threaded rods 28, the two second fixing seats 27 are symmetrically arranged on the workbench 1, the two second threaded rods 28 are symmetrically arranged on the two second fixing seats 27, the second moving block 26 can be slidably sleeved on the two second threaded rods 28, a second belt wheel is sleeved on each of the two second threaded rods 28, a second belt 35 is arranged on each second belt wheel, one second threaded rod 28 is driven by a second motor 29, and the second moving block 26 moves in a stable groove through one stable seat. When the pipe bend is clamped, the second moving block 26 moves the two tapping mechanisms 5 towards the pipe bend on the two second threaded rods 28.

Two tapping mechanisms 5 all include a rotating electrical machines 30, an electronic lead screw slip table 31 of third, a third slider 32 and a tapping tool bit 33, and the electronic lead screw slip table 31 of third sets up on second movable block 26, and third slider 32 slides and sets up on the electronic lead screw slip table 31 of third, and rotating electrical machines 30 is fixed in on third slider 32 through a motor box, and tapping tool bit 33 is fixed in on the output shaft of rotating electrical machines 30. When the tapping tool bit 33 comes to the end of the bent pipe, each tapping tool bit 33 is respectively adjusted in position by the corresponding third electric screw sliding table 31, and finally the rotary motor 30 drives the tapping tool bit 33 to tap the end of the bent pipe.

The working principle is as follows: when an operator starts to tap the bent pipe, firstly, the material pushing cylinder 6 drives the first clamping part 8 to push the bent pipe forwards, then the two long shaft cylinders 7 drive the respective second clamping parts 9 to clamp the two sides of the bent pipe, when the bent pipe is pushed to the two semi-cylinders 14, the two semi-cylinders 14 are respectively driven by the respective first electric screw rod sliding tables 11, the two semi-cylinders 14 are clamped and adjusted according to the size of the bent pipe, then the two second clamping parts 9 and the corresponding semi-cylinders 14 are matched to clamp the bent pipe, when the tail part of the bent pipe is pushed, the material pushing cylinder 6 also drives the first clamping part 8 to clamp the bent pipe, after the bent pipe is preliminarily fixed, the two upward clamping devices and the downward clamping devices finally clamp the end part of the bent pipe, and the third clamping part 20 firstly moves upwards through the telescopic cylinder 19, and the third clamping part 20 also carries out position adjustment through the second electric screw rod sliding table 17, when two downward clamping devices clamp the elbow, firstly, the fourth clamping part carries out position adjustment through the driving of the two first threaded rods 24, then, each fourth clamping part extends downwards through the respective vertical cylinder 22, the third clamping part 20 and the fourth clamping part are mutually matched to clamp the end part of the elbow, after the elbow is clamped, the second moving block 26 drives the two tapping mechanisms 5 to move towards the elbow on the two second threaded rods 28, when the tapping tool bit 33 comes to the end part of the elbow, each tapping tool bit 33 carries out position adjustment through the corresponding third electric screw rod sliding table 31, and finally, the rotating motor 30 drives the tapping tool bit 33 to tap the end part of the elbow.

It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. A C-shaped elbow end tapping device is characterized by comprising a workbench (1), it is characterized by also comprising a clamping component and a tapping component, wherein the clamping component is arranged at the top of the workbench (1), the tapping component is also arranged at the top of the workbench (1), the clamping component comprises a tail clamping mechanism (2) and an end part clamping mechanism (3), the tail clamping mechanism (2) is arranged at one end of the top of the workbench (1), the end part clamping mechanism (3) is arranged at one side of the tail clamping mechanism (2), and the end part clamping mechanism (3) is positioned between the tail part clamping mechanism (2) and the tapping assembly, the tapping assembly comprises a moving mechanism (4) and two symmetrically arranged tapping mechanisms (5), the moving mechanism (4) is arranged on the other side of the end part clamping mechanism (3), and the two tapping mechanisms (5) are arranged above the moving mechanism (4).

2. The tapping device for the end of a C-shaped elbow according to claim 1, wherein the tail clamping mechanism (2) is composed of a material pushing cylinder (6) and two long axis cylinders (7), one end of the worktable (1) is provided with a supporting platform for supporting the tail clamping mechanism (2), the material pushing cylinder (6) is horizontally arranged on the supporting platform, the output direction of the material pushing cylinder (6) is parallel to the length direction of the worktable (1), the output shaft of the material pushing cylinder (6) is horizontally provided with a first clamping part (8), the two long axis cylinders (7) are horizontally and symmetrically arranged on the supporting platform, the output directions of the two long-axis cylinders (7) are vertical to the output direction of the material pushing cylinder (6), and the output shafts of the two long-axis cylinders (7) are also respectively provided with a second clamping part (9) in a horizontal state.

3. The tapping device for the end of a C-shaped elbow according to claim 2, wherein the tail clamping mechanism (2) further comprises a supporting seat, a supporting frame (10) and two stabilizing devices symmetrically arranged in the supporting frame (10), the supporting seat is arranged between the supporting seat and the end clamping mechanism (3), the supporting frame (10) is arranged on the supporting seat, each of the two stabilizing devices comprises a first electric screw rod sliding table (11), a first sliding block (12), a stabilizing frame (13), a semi-cylinder (14) and two supporting rods (15), the first electric screw rod sliding table (11) is arranged at the bottom of the inner side of the supporting frame (10), the first sliding block (12) is slidably arranged on the first electric screw rod sliding table (11), the stabilizing frame (13) is arranged on the first sliding table, the semi-cylinder (14) is arranged at the top of the supporting frame (10), two ends of the two supporting rods (15) are respectively connected with the semi-cylinder (14) and the first sliding table, and the top of the inner side of the support frame (10) is also provided with a fixing groove for the sliding of the two stabilizing frames (13).

4. The C-shaped elbow end tapping device according to claim 3, wherein the end clamping mechanism (3) comprises a bracket (16), two symmetrically arranged upward clamping devices and two symmetrically arranged downward clamping devices, the bracket (16) is arranged between the supporting base and the moving mechanism (4), each upward clamping device is provided with a second electric screw rod sliding table (17), second slider (18), telescopic cylinder (19) and third clamping part (20) are constituteed, electronic lead screw slip table of second (17) set up in support (16) inboard bottom, second slider (18) can gliding set up in the top of the electronic lead screw slip table of second (17), telescopic cylinder (19) are vertical state and set up on second slider (18), third clamping part (20) set up on telescopic cylinder's (19) output shaft, and every telescopic cylinder (19) are all fixed through a mount.

5. The C-shaped elbow end tapping device according to claim 4, wherein each of the two downward clamping devices comprises a first moving block (21), a vertical cylinder (22), two first fixed seats (23) and two first threaded rods (24), the two first fixed seats (23) are symmetrically arranged on the top of the bracket (16), the two first threaded rods (24) are symmetrically arranged on the two first fixed seats (23), the first moving block (21) is slidably arranged on the two first threaded rods (24), the vertical cylinder (22) is arranged on the first moving block (21), a fourth clamping portion (36) is arranged on a downward extending end of an output shaft of the vertical cylinder (22), two first belt pulleys are arranged at the ends of the two first threaded rods (24), and a first belt (34) is sleeved on each belt pulley, a first motor (25) is also arranged on the first threaded rod (24).

6. The C-shaped elbow end tapping device according to claim 2, wherein the moving mechanism (4) comprises a second moving block (26), two second fixed seats (27) and two second threaded rods (28), the two second fixed seats (27) are symmetrically arranged on the workbench (1), the two second threaded rods (28) are symmetrically arranged on the two second fixed seats (27), the second moving block (26) can be slidably sleeved on the two second threaded rods (28), a second belt wheel is sleeved on each of the two second threaded rods (28), a second belt (35) is arranged on each second belt wheel, each second threaded rod (28) is further driven by a second motor (29), and the second moving block (26) moves in a stable groove through a stable seat.

7. The C-shaped elbow end tapping device according to claim 6, wherein each of the two tapping mechanisms (5) comprises a rotating motor (30), a third electric screw rod sliding table (31), a third sliding block (32) and a tapping tool bit (33), the third electric screw rod sliding table (31) is arranged on the second moving block (26), the third sliding block (32) is arranged on the third electric screw rod sliding table (31) in a sliding manner, the rotating motor (30) is fixed on the third sliding block (32) through a motor box, and the tapping tool bit (33) is fixed on an output shaft of the rotating motor (30).