CN116900360A - Radial porous drilling assembly of pipe parts and device using same - Google Patents

Abstract

The present disclosure relates to a radial multi-hole drilling assembly for pipe parts and a device using the same, wherein the device comprises a propelling mechanism, a rotating mechanism, a drilling mechanism, a clamping mechanism and a supporting frame; the propelling mechanism comprises a shell, a hydraulic cylinder body, a hydraulic rod, a push rod, a hydraulic motor, a large bevel gear, a coupler and a sliding tube; the rotary mechanism drives the gear to rotate through the stepping motor, and the guide groove is formed in the sliding tube, so that the drilling mechanism can perform rotary motion on the sliding tube; the drilling mechanism comprises a hydraulic cylinder, an upper cover, a feed hydraulic rod, a fixed rod, a drill bit, a reset end cover, a large gear, a reset spring, a pinion, a small bevel gear and a lower cover, and the drill bit is rotated through rotation of the pinion and the small bevel gear; the clamping mechanism adopts a planetary gear speed reduction structure to finish the rotation operation of the pipe parts, and can realize automatic operation under the control of the singlechip; the radial multi-hole drilling device for the pipe parts is high in automation degree and capable of improving machining efficiency.

Description

Radial porous drilling assembly of pipe parts and device using same

Technical Field

The disclosure relates to the field of machining, in particular to a device capable of radially drilling multiple holes in a pipe part.

Background

With the development of modern industry, pipe parts are widely used as an important industrial appliance. In the prior art, for the inner blind hole drilling of pipe parts, a single hole drilling method is generally adopted to drill the pipe parts, as shown in the publication of a device for processing the inner blind hole of a shell, in CN202220539437.2, but the device for drilling the single hole has the problem of low production efficiency generally, and is not widely popularized and applied.

Disclosure of Invention

The present disclosure provides a radial porous drilling subassembly of pipe part and device of using it, can solve the prior art problem pointed out in the background art, not only is applicable to porous drilling operation, also is applicable to single hole drilling operation to have the characteristics that the finished product quality is high and degree of automation is high, can promote machining efficiency, guarantee operating personnel's personal safety.

The present disclosure relates to a radial porous drilling assembly of pipe parts, basic scheme 1: the assembly comprises a propulsion mechanism 1 which is unique in that:

the propulsion mechanism 1 comprises a housing 11, a hydraulic cylinder 12, a hydraulic rod 13, a push rod 14, a hydraulic motor 15, a large bevel gear 16, a coupling 17, a sliding tube 18 and a bearing A19. The hydraulic cylinder body 12 is fixed inside the shell 11 through bolts, and a hydraulic rod 13 is arranged inside the hydraulic cylinder body 12; the hydraulic rod 13 is connected with the push rod 14 through bolts, round holes are formed in the upper end and the lower end of the push rod 14, and the hydraulic rod is fixed on the sliding tube 18 through bolts; when the hydraulic rod 13 stretches out of the hydraulic cylinder body 12, the hydraulic rod 13 drives the sliding tube 18 to move forwards, so that the telescopic function of the propulsion mechanism 1 is realized; the hydraulic motor 15 is fixed in the sliding tube 18 through a bolt, and the output end of the hydraulic motor 15 is connected with the large bevel gear 16 through a coupler 17, so that a rotation moment is provided for the large bevel gear 16; the large bevel gear 16 is fixed in the sliding tube 18 by a bearing a19 so that the large bevel gear 16 can rotate relative to the sliding tube 18.

Further optimization on the base scheme 1 gives scheme 2: the assembly further comprises a rotation mechanism 2;

the rotating mechanism 2 comprises a rotating motor 21, a motor support 22, a support plate 23, a gear 24, an internal gear 25, a connecting plate 26 and a sliding column 27; the rotary electric machine 21 is fixed to the motor mount 22 by bolts, and the motor mount 22 is fixed to the inside of the slide tube 18 by bolts; the output end of the rotary motor 21 is provided with a gear 24, and the gear 24 is meshed with an internal gear 25;

the push rod 14 of the pushing mechanism 1 is fixed to the sliding tube 18 by a bolt, and the rotating mechanism 2 is axially extended and contracted along the circular tube 5 by the pushing mechanism 1.

Further optimization of scheme 2 gave scheme 3:

the assembly further comprises a drilling mechanism 3;

the drilling mechanism 3 comprises a hydraulic cylinder 31, an upper cover 32, a feed hydraulic rod 33, a fixed rod 34, a bearing B35, a drill bit 36, a reset end cover 37, a large gear 38, a reset spring 39, a small gear 310, a small bevel gear 311, a bearing C312 and a lower cover 313;

the feed hydraulic cylinder 31 is fixed to the upper cover 32 by a bolt, and a feed hydraulic rod 33 is installed in the feed hydraulic cylinder 31;

the front end of the feed hydraulic rod 33 is connected with the fixed rod 34 through a bolt, so that the feed hydraulic rod 33 and the fixed rod 34 synchronously move; the feeding hydraulic cylinder 33 is mounted on a drill bit 36 through two bearings B35, and a reset end cover 37 is mounted at the upper end of the drill bit 36 through bolts; a return spring 39 is installed between the return end cover 37 and the large gear 38, and when the supply of hydraulic oil is stopped, the return spring 39 returns the drill bit 36 to its original position.

Pinion gear 310 is fixed to pinion bevel gear 311 by bolts, and both sides of pinion bevel gear 311 are fixed between upper cover 32 and lower cover 313 by two bearings C312; bevel pinion 311 is in interference fit with pinion 310, bevel pinion 311 transmitting torque to pinion 310; the drill bit 36 is externally splined to enable feed movement of the drill bit (36) as the drill bit 36 rotates;

the supporting plate 23 is fixed on the drilling mechanism 3 through bolts and plays a role in fixedly supporting the drilling mechanism 3;

the internal gear 25 is connected with the drilling mechanism 3 through bolts; the drilling mechanism 3 rotates relative to the sliding tube 18 by the torque output by the rotating motor 21, so as to realize radial accurate positioning of multiple drills;

the connecting plate 26 is fixed on the drilling mechanism 3 through bolts, 4 sliding columns 27 are arranged on the connecting plate 26, the sliding columns 27 are in contact with guide rails processed at the front ends of the sliding tubes 18, and support is provided for the rotation of the drilling mechanism 3 relative to the sliding columns 27;

the front end of the sliding tube 18 is machined with a circular track to which the drilling mechanism 3 is mounted by means of sliding posts 27, which circular track enables the drilling mechanism 3 to follow a fixed trajectory.

Further optimization of scheme 3 gave scheme 4:

the assembly further comprises a clamping mechanism 4;

the clamping mechanism 4 comprises a stepping motor 41, a clamping base 42, a minor planetary gear 43, a key 44, a major planetary gear 45, a rotating pin 46, a turntable 47, a chuck 48 and a clamping jaw 49; the stepping motor 41 is fixed on the clamping base 42 through bolts, and a small planetary gear 43 is arranged on an output shaft of the stepping motor 41; a key 44 is installed between the output shaft of the stepping motor 41 and the pinion gear 43, and the output torque of the stepping motor 41 is transmitted to the pinion gear 43 through the key 44; the small planetary gears 43 are meshed with three large planetary gears 45, and the large planetary gears 45 are connected with a turntable 47 through rotating pins 46; the turntable 47 is connected to the chuck 48 by threads.

Another aspect of the disclosure is to provide a radial multi-hole drilling device for a pipe part, which uses the assembly described in the scheme 4, and a support frame 6;

three clamping pliers 49 are arranged on the chuck 48, and circular tubes 5 with different diameters can be clamped by manual adjustment; the supporting frame 6 is used for bearing the components in the scheme 4, and is formed by splicing sectional materials so as to be convenient to install and detach; the support frame is provided with a guide rail groove for fixing an external mechanism.

Further, the stepping motor in the clamping mechanism 4 can work under the instruction of the singlechip control system so as to realize automatic porous radial drilling processing.

The method for operating the radial multi-hole drilling device of the pipe part comprises the following steps:

first, the round tubes 5 with different diameters are fixed on the three-jaw chuck by manually adjusting the clamping pliers 49;

step two, turning on a main power supply, starting a hydraulic system, and turning on all motors; the hydraulic system supplies oil to the hydraulic cylinder body 12, and hydraulic oil pushes the hydraulic rod 13 to move forwards, so that the drilling mechanism 3 is driven to move into the circular tube 5; when the drilling mechanism 3 reaches the designated position, the hydraulic system stops supplying oil into the hydraulic cylinder 12, and the drilling mechanism 3 reaches the designated position to stop moving;

thirdly, the output shaft of the rotary motor 21 rotates, and the gear 24 drives the internal gear 25 to rotate, so that the drilling mechanism 3 rotates to a machining position;

a fourth step, the hydraulic system supplies oil to the hydraulic motor 15, and torque is transmitted to the drilling mechanism 3 through the large bevel gear 16; the drill bit 36 is driven to rotate by gear transmission in the drilling mechanism 3;

fifthly, the hydraulic system supplies oil into the hydraulic cylinder 31 to drive the feed hydraulic rod 33 to move forwards, so that the function of drilling a round hole by the drill bit 36 is realized;

sixthly, repeating the second step to the fifth step until the drilling operation is finished; and closing the control system, the motor and an external power supply.

The above-mentioned at least one technical solution adopted by one or more embodiments of the present disclosure can achieve the following beneficial effects:

firstly, the assembly and the multi-hole drilling device provided by the disclosure are innovative on the whole, and a plurality of radial hole sites can be machined in the pipe part at one time by adopting a working mode of radial multi-hole drilling, so that the machining efficiency of the inner hole of the pipe part is improved.

Secondly, the inside of the multi-hole drilling device provided by the disclosure adopts bevel gear transmission, so that the torque transmission direction can be changed, and a plurality of drill bits can drill in different directions stably.

Thirdly, the propelling mechanism provided by the present disclosure adopts a hydraulic mode to drive, so that the drill bit can stably run and accurately position the drilling position.

In addition, the clamping mechanism provided by the disclosure adopts the planetary gear speed reducing mechanism to adjust the angle of the pipe part, and the drilling position can be adjusted at any time in the process of machining holes, so that the machining efficiency is improved.

In addition, the drilling mechanism provided by the disclosure adopts a hydraulic transmission mode to provide power for the feeding motion of drilling, and the hydraulic transmission mode saves the space structure of the drilling mechanism.

In summary, the radial multi-hole drilling device for the pipe parts provided by the disclosure adopts the hydraulic system as drilling power, and can utilize the singlechip control system to realize automatic multi-hole radial drilling processing, so that the radial multi-hole drilling device is not only suitable for multi-hole drilling operation, but also suitable for single-hole drilling operation, has the characteristics of high product quality and high automation degree, and can improve the processing efficiency and ensure the personal safety of operators.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the technical aspects of the disclosure.

Fig. 1 is a schematic front view of a radial multi-hole drilling device for a tubular part according to the present disclosure.

Fig. 2 is a schematic front view of the propulsion mechanism of the present disclosure.

Fig. 3 is a schematic front view of a rotary mechanism according to the present disclosure.

Fig. 4 is a schematic side view of a rotation mechanism according to the present disclosure.

Fig. 5 is a schematic front view of the drilling mechanism according to the present disclosure.

Fig. 6 is a schematic front view of the clamping mechanism of the present disclosure.

The drawing shows that the device comprises a 1-propelling mechanism, a 2-rotating mechanism, a 3-drilling mechanism, a 4-clamping mechanism, a 5-round pipe, a 6-supporting frame, a 11-housing, a 12-hydraulic cylinder, a 13-hydraulic rod, a 14-push rod, a 15-hydraulic motor, a 16-large bevel gear, a 17-coupling, a 18-sliding pipe, a 19-bearing A, a 21-rotating motor, a 22-motor support, a 23-supporting plate, a 24-gear, a 25-internal gear, a 26-connecting plate, a 27-sliding column, a 31-hydraulic cylinder, a 32-upper cover, a 33-feeding hydraulic rod, a 34-fixed rod, a 35-bearing B, a 36-drill bit, a 37-reset end cover, a 38-large gear, a 39-reset spring, a 310-small gear, a 311-small bevel gear, a 312-bearing C, a 313-lower cover, a 41-stepping motor, a 42-clamping base, a 43-small planetary gear, a 44-key, a 45-large planetary gear, a 46-rotating pin, a 47-turntable, a 48-chuck and a 49-clamping jaw.

Detailed Description

Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order not to obscure the present disclosure.

As shown in fig. 1 to 6, the radial multi-hole drilling device for the pipe parts comprises a pushing mechanism 1, a rotating mechanism 2, a drilling mechanism 3, a clamping mechanism 4, a round pipe 5 and a supporting frame 6.

The propulsion mechanism 1 comprises a shell 11, a hydraulic cylinder body 12, a hydraulic rod 13, a push rod 14, a hydraulic motor 15, a large bevel gear 16, a coupler 17, a sliding tube 18 and a bearing A19; the hydraulic cylinder body 12 is fixed inside the shell 11 through bolts, and a hydraulic rod 13 is arranged inside the hydraulic cylinder body 12; the hydraulic rod 13 is connected with the push rod 14 through bolts, round holes are formed in the upper end and the lower end of the push rod 14, and the hydraulic rod is fixed on the sliding tube 18 through bolts; when the hydraulic rod 13 stretches out of the hydraulic cylinder body 12, the hydraulic rod 13 drives the sliding tube 18 to move forwards, so that the telescopic function of the propulsion mechanism 1 is realized; the hydraulic motor 15 is fixed in the sliding tube 18 through a bolt, and the output end of the hydraulic motor 15 is connected with the large bevel gear 16 through a coupler A17, so that a large rotation moment is provided for the large bevel gear 16; the large bevel gear 16 is fixed in the sliding tube 18 by a bearing a19, so that the large bevel gear 16 rotates relative to the sliding tube 18.

The rotating mechanism 2 comprises a rotating motor 21, a motor support 22, a supporting plate 23, a gear 24, an internal gear 25, a connecting plate 26 and a sliding column 27; wherein the rotary electric machine 21 is fixed to the motor mount 22 by bolts, and the motor mount 22 is fixed to the inside of the slide tube 18 by bolts; the output end of the rotary motor 21 is provided with a gear 24, the gear 24 is meshed with an internal gear 25, and the internal gear 25 is connected with the drilling mechanism 3 through bolts; the drilling mechanism 3 is rotated relative to the sliding tube 18 by the torque output from the rotating motor 21; the connecting plate 26 is fixed on the drilling mechanism 3 through bolts, 4 sliding columns 27 are arranged on the connecting plate 26, the sliding columns 27 are in contact with guide rails processed at the front ends of the sliding tubes 18, and support is provided for the rotation of the drilling mechanism 3 relative to the sliding columns 27; the support plate 23 is fixed to the drilling mechanism 3 by bolts, and serves to fixedly support the drilling mechanism 3.

The drilling mechanism 3 comprises a hydraulic cylinder 31, an upper cover 32, a feed hydraulic rod 33, a fixed rod 34, a bearing B35, a drill bit 36, a reset end cover 37, a large gear 38, a reset spring 39, a pinion 310, a bevel pinion 311, a bearing C312 and a lower cover 313; wherein the feed hydraulic cylinder 31 is fixed to the upper cover 32 by a bolt, and a feed hydraulic rod 33 is installed in the feed hydraulic cylinder 31; the front end of the feed hydraulic rod 33 is connected with the fixed rod 34 through a bolt, so that the feed hydraulic rod 33 and the fixed rod 34 synchronously move; the feeding hydraulic cylinder 33 is mounted on a drill bit 36 through two bearings B35, and a reset end cover 37 is mounted at the upper end of the drill bit 36 through bolts; a return spring 39 is arranged between the return end cover 37 and the large gear 38, and when the hydraulic oil stops being supplied, the return spring 39 enables the drill bit 36 to return to the original position; pinion gear 310 is fixed to pinion bevel gear 311 by bolts, and both sides of pinion bevel gear 311 are fixed between upper cover 32 and lower cover 313 by two bearings C312; bevel pinion 311 is in interference fit with pinion 310, bevel pinion 311 transmitting torque to pinion 310; the drill bit 36 is externally splined to enable feed movement of the drill bit 36 as the drill bit 36 rotates.

The clamping mechanism 4 comprises a stepping motor 41, a clamping base 42, a minor planetary gear 43, a key 44, a major planetary gear 45, a rotating pin 46, a turntable 47, a chuck 48 and a clamping jaw 49; wherein, the stepping motor 41 is fixed on the clamping base 42 through bolts, and a small planetary gear 43 is arranged on the output shaft of the stepping motor 41; a key 44 is installed between the output shaft of the stepping motor 41 and the pinion gear 43, and the output torque of the stepping motor 41 is transmitted to the pinion gear 43 through the key 44; the small planetary gears 43 are meshed with three large planetary gears 45, and the large planetary gears are connected with the turntable through rotating pins; the turntable is connected with the chuck through threads; three clamping jaws 49 are mounted on the chuck and can be manually adjusted to clamp round tubes of different diameters.

The supporting frame 6 is a bearing device formed by splicing molding materials, and is easy to process and convenient to detach; the support frame is provided with the guide rail groove, so that the external device can be conveniently fixed, the reliability is high, and the flexibility is strong.

When in use, the method comprises the following steps:

1. the round tubes 5 of different diameters are fixed to the three-jaw chuck by manually adjusting the clamping jaws 49.

2. And (5) switching on a main power supply, starting a hydraulic system, and switching on all motors. The hydraulic system supplies oil to the hydraulic cylinder body 12, and the hydraulic oil pushes the hydraulic rod 13 to move forwards, so that the drilling mechanism 3 is driven to move into the circular tube 5. When the drilling mechanism 3 reaches the specified position, the hydraulic system stops supplying oil into the hydraulic cylinder 12, and the drilling mechanism 3 reaches the specified position to stop the movement.

3. The output shaft of the rotary motor 21 rotates, and the internal gear 25 is driven to rotate by the gear 24, so that the drilling mechanism 3 rotates to a machining position.

4. The hydraulic system supplies oil into the hydraulic motor 15 and transmits torque to the drilling mechanism 3 via the large bevel gear 16. The drill bit 36 is driven to rotate by gear transmission in the drilling mechanism 3.

5. The hydraulic system supplies oil to the hydraulic cylinder 31 to drive the feed hydraulic rod 33 to move forwards, so that the function of drilling a round hole by the drill bit 36 is realized.

6. And (5) repeating the steps 2-5 until the drilling operation is finished. And (5) closing the control system, the motor, an external power supply and the like, and cleaning, packaging and storing the device.

The embodiments that have been described above are illustrative, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or to improve the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (7)

1. The utility model provides a radial porous drilling subassembly of pipe class part, includes advancing mechanism (1), its characterized in that:

the propelling mechanism (1) comprises a shell (11), a hydraulic cylinder body (12), a hydraulic rod (13), a push rod (14), a hydraulic motor (15), a large bevel gear (16), a coupler (17), a sliding pipe (18) and a bearing A (19); the hydraulic cylinder body (12) is fixed inside the shell (11) through bolts, and a hydraulic rod (13) is arranged inside the hydraulic cylinder body (12); the hydraulic rod (13) is connected with the push rod (14) through a bolt, round holes are formed in the upper end and the lower end of the push rod (14), and the hydraulic rod is fixed on the sliding tube (18) through a bolt; when the hydraulic rod (13) stretches out of the hydraulic cylinder body (12), the hydraulic rod (13) drives the sliding tube (18) to move forwards, so that the telescopic function of the propulsion mechanism (1) is realized; the hydraulic motor (15) is fixed in the sliding tube (18) through a bolt, and the output end of the hydraulic motor (15) is connected with the large bevel gear (16) through a coupler (17), so that a rotation moment is provided for the large bevel gear (16); the large bevel gear (16) is fixed in the sliding tube (18) through a bearing A (19), so that the large bevel gear (16) can rotate relative to the sliding tube (18).

2. A tubular part radial multi-hole drilling assembly according to claim 1, wherein:

the assembly further comprises a rotation mechanism (2);

the rotating mechanism (2) comprises a rotating motor (21), a motor support (22), a supporting plate (23), a gear (24), an internal gear (25), a connecting plate (26) and a sliding column (27); the rotary motor (21) is fixed on the motor support (22) through bolts, and the motor support (22) is fixed inside the sliding tube (18) through bolts; the output end of the rotating motor (21) is provided with a gear (24), and the gear (24) is meshed with an internal gear (25);

the push rod (14) of the pushing mechanism (1) is fixed on the sliding tube (18) through a bolt, and the rotating mechanism (2) is enabled to axially stretch along the circular tube (5) through the pushing mechanism (1).

3. A tubular part radial multi-hole drilling assembly as claimed in claim 2, wherein:

the assembly further comprises a drilling mechanism (3);

the drilling mechanism (3) comprises a hydraulic cylinder (31), an upper cover (32), a feed hydraulic rod (33), a fixed rod (34), a bearing B (35), a drill bit (36), a reset end cover (37), a large gear (38), a reset spring (39), a pinion (310), a small bevel gear (311), a bearing C (312) and a lower cover (313);

the feeding hydraulic cylinder (31) is fixed on the upper cover (32) through a bolt, and a feeding hydraulic rod (33) is arranged in the feeding hydraulic cylinder (31);

the front end of the feeding hydraulic rod (33) is connected with the fixed rod (34) through a bolt, so that the feeding hydraulic rod (33) and the fixed rod (34) synchronously move; the feeding hydraulic cylinder (33) is mounted on the drill bit (36) through two bearings B (35), and a reset end cover (37) is mounted at the upper end of the drill bit (36) through bolts; a return spring (39) is arranged between the return end cover (37) and the large gear (38), and when the supply of hydraulic oil is stopped, the return spring (39) enables the drill bit (36) to return to the original position;

the pinion (310) is fixed on the bevel pinion (311) through bolts, and two sides of the bevel pinion (311) are fixed between the upper cover (32) and the lower cover (313) through two bearings C (312); the bevel pinion (311) is in interference fit with the pinion (310), and the bevel pinion (311) transmits torque to the pinion (310); the drill bit (36) is externally provided with a spline, and feeding movement of the drill bit (36) can be realized when the drill bit (36) rotates;

the supporting plate (23) is fixed on the drilling mechanism (3) through bolts and plays a role in fixedly supporting the drilling mechanism (3);

the internal gear (25) is connected with the drilling mechanism (3) through bolts; the drilling mechanism (3) rotates relative to the sliding tube (18) through the torque output by the rotating motor (21) so as to realize radial accurate positioning of multiple drill bits;

the connecting plate (26) is fixed on the drilling mechanism (3) through bolts, 4 sliding columns (27) are arranged on the connecting plate (26), the sliding columns (27) are in contact with guide rails processed at the front ends of the sliding pipes (18), and support is provided for rotation of the drilling mechanism (3) relative to the sliding columns (27);

the front end of the sliding tube (18) is provided with a circular track, the drilling mechanism (3) is mounted on the circular track through a sliding column (27), and the circular track can enable the drilling mechanism (3) to move along a fixed track.

4. A tubular part radial multi-hole drilling assembly according to claim 3, wherein:

the assembly further comprises a clamping mechanism (4);

the clamping mechanism (4) comprises a stepping motor (41), a clamping base (42), a minor planetary gear (43), a key (44), a major planetary gear (45), a rotating pin (46), a rotary table (47), a chuck (48) and clamping pliers (49); the stepping motor (41) is fixed on the clamping base (42) through bolts, and a small planetary gear (43) is arranged on an output shaft of the stepping motor (41); a key (44) is arranged between the output shaft of the stepping motor (41) and the minor planet gear (43), and the output torque of the stepping motor (41) is transmitted to the minor planet gear (43) through the key (44); the small planetary gears (43) are meshed with three large planetary gears (45), and the large planetary gears (45) are connected with a turntable (47) through rotating pins (46); the turntable (47) is connected with the chuck (48) through threads.

5. A radial multi-hole drilling device for pipe parts is characterized in that: -use of an assembly according to claim 4, and-a support (6);

three clamping pliers (49) are arranged on the chuck (48) and can clamp round tubes (5) with different diameters by manual adjustment; the support frame (6) is used for bearing the assembly of claim 4, and is formed by splicing sectional materials; the support frame is provided with a guide rail groove for fixing an external mechanism.

6. The radial multi-hole drilling device for pipe parts according to claim 5, wherein the stepping motor in the clamping mechanism (4) can work under the instruction of a single-chip microcomputer control system to realize automatic multi-hole radial drilling.

7. A method of operating the tubular part radial multi-hole drilling apparatus of claim 6, comprising the steps of:

firstly, fixing round tubes (5) with different diameters on a three-jaw chuck by manually adjusting a clamping clamp (49);

step two, turning on a main power supply, starting a hydraulic system, and turning on all motors; the hydraulic system supplies oil to the hydraulic cylinder body (12), and hydraulic oil pushes the hydraulic rod (13) to move forwards, so that the drilling mechanism (3) is driven to move into the circular tube (5); when the drilling mechanism (3) reaches a designated position, the hydraulic system stops supplying oil into the hydraulic cylinder body (12), and the drilling mechanism (3) reaches the designated position and stops moving;

thirdly, an output shaft of the rotating motor (21) rotates, and the gear (24) drives the internal gear (25) to rotate, so that the drilling mechanism (3) rotates to a machining position;

the fourth step, the hydraulic system supplies oil to the hydraulic motor (15), and transmits torque to the drilling mechanism (3) through the large bevel gear (16); the drill bit (36) is driven to rotate by gear transmission in the drilling mechanism (3);

fifthly, the hydraulic system supplies oil to the hydraulic cylinder (31) to drive the feed hydraulic rod (33) to move forwards, so that the function of drilling a round hole by the drill bit (36) is realized;

sixthly, repeating the second step to the fifth step until the drilling operation is finished; and closing the control system, the motor and an external power supply.