Large-diameter multi-connection joint multi-surface synchronous milling and drilling device

Abstract

The application discloses a large-diameter multi-connection joint multi-surface synchronous milling and drilling device, which comprises a rack, a clamping mechanism, an X-direction feeding mechanism, a Y-direction feeding mechanism, a drilling mechanism, a milling mechanism and a top cone; the clamping mechanism is connected to the rack at the center of the drilling mechanism and the milling mechanism, and the clamping mechanism comprises a lower V-shaped clamping plate capable of rotating and lifting; the X-direction feeding mechanism is connected to the rack, and two ends of the X-direction feeding mechanism are connected with sliding seats a, and two groups of drilling mechanisms are respectively connected to the two sliding seats a; the Y-direction feeding mechanism is connected to the rack, and two groups of milling mechanisms are respectively connected to two sliding seats b; a plurality of drill bits are connected to the power output end of the drilling mechanism, large milling cutters and small milling cutters are connected to the power output end of the milling mechanism, and the top cone is connected to the drilling mechanism and the milling mechanism. The milling and drilling of the end surface and the inner circular surface of the flange plate on the large-diameter multi-connection joint can be synchronously performed, and the processing efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a multi-face synchronous milling and drilling device for large-diameter multi-port joints. Background Technology

[0002] Large-diameter multi-way fittings are commonly used in the petroleum and chemical industries, at branches of main pipelines. The fitting has three or four ports, i.e., one inlet and two outlets, or one inlet and three outlets. The ports can be of equal diameter or different diameters.

[0003] Large-diameter multi-way joints have flanges installed at the pipe openings for connection to the pipeline. During manufacturing, the end face and inner surface of the flange need to be milled, and several connection holes also need to be drilled on the flange. Existing milling and drilling equipment mostly uses a single-sided, one-by-one machining method, which greatly reduces manufacturing efficiency and cannot guarantee machining accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-face synchronous milling and drilling device for large-diameter multi-port joints, in which the milling and drilling of the end face and inner circular face of the flange on the large-diameter multi-port joint can be carried out simultaneously, which greatly improves the processing efficiency and ensures the processing accuracy, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A large-diameter multi-port joint multi-face synchronous milling and drilling device includes a frame, a clamping mechanism, an X-axis feed mechanism, a Y-axis feed mechanism, a drilling mechanism, a milling mechanism, and a top cone;

[0007] The clamping mechanism is connected to the frame at the center of the drilling mechanism and the milling mechanism. The clamping mechanism includes a lower V-plate that can rotate and be lifted, and an upper V-plate that is detachably connected to the lower V-plate.

[0008] The X-axis feed mechanism is connected to the frame, and slide blocks a are connected to both ends of the X-axis feed mechanism. The two sets of drilling mechanisms are respectively connected to the two slide blocks a, and the two sets of drilling mechanisms are arranged facing each other.

[0009] The Y-axis feed mechanism is connected to the frame, and slides b are connected to both ends of the Y-axis feed mechanism. The two sets of milling mechanisms are respectively connected to the two slides b, and the two sets of milling mechanisms are arranged facing each other.

[0010] The drilling mechanism has several drill bits connected to its power output end, and the milling mechanism has a large milling cutter and a small milling cutter connected to its power output end. The top cone is connected to both the drilling mechanism and the milling mechanism.

[0011] A further improvement of the present invention is that the bottom of the frame is connected to a support leg, a support platform is connected between the support legs, a dovetail groove is symmetrically arranged in the X direction at the top of the frame, a track is symmetrically connected in the Y direction, and a central hole is opened at the center of the frame.

[0012] A further improvement of the present invention is that the clamping mechanism further includes a first motor, a first lead screw, and a threaded sleeve; a rotating support block is connected to the top of the first lead screw, guide rods are connected to both sides of the rotating support block, a guide sleeve is connected between the bottom of the frame and the support platform, and the guide rods are slidably engaged with the guide sleeve; the threaded sleeve is connected to the central hole and extends to the bottom of the frame, the first lead screw is threadedly engaged with the threaded sleeve, and the first motor is driven and connected to the bottom of the first lead screw; a servo motor is connected to the rotating support block, and the power output end of the servo motor is connected to the lower V-plate; the upper V-plate is connected to the lower V-plate by a bolt and nut assembly, a threaded post is threadedly engaged on the upper V-plate, a pressure plate is connected to the bottom of the threaded post, and a handle is connected to the top of the threaded post.

[0013] A further improvement of the present invention is that the X-axis feed mechanism further includes a second motor, a second lead screw, and a slide rod a; the two ends of the second lead screw and the slide rod a are rotatably connected to the two ends of the frame in the X direction, the second motor is connected to the end of the frame, and the power output shaft of the second motor is driven and connected to the second lead screw; the slide block a is threadedly engaged with the second lead screw and slidably engaged with the slide rod a, and the slide block a is slidably engaged with the dovetail groove through the dovetail block at the bottom.

[0014] A further improvement of the present invention is that the Y-axis feed mechanism further includes a third motor, a third lead screw, and a slide bar b; the two ends of the third lead screw and the slide bar b are rotatably connected to the two ends of the frame in the Y direction, the third motor is connected to the end of the frame, and the third motor is driven by the third lead screw; the bottom end of the slide bar b is connected to a slider, the slider is threaded to the third lead screw and slidably engaged with the slide bar b, and the bottom of the slide bar b is slidably engaged with the track; both the second lead screw and the third lead screw are bidirectional lead screws.

[0015] A further improvement of the present invention is that the sides of both the slide block a and the slider are connected to an opening and closing nut assembly; the opening and closing nut assembly includes a knob and two semi-circular nut blocks, the inner sides of the slide block a and the slider are provided with sliding grooves, and the two semi-circular nut blocks are slidably engaged in the sliding grooves; one end of each nut block is connected to a sliding rod c, the inner side of the knob is provided with two arc-shaped grooves, the sliding rod c is slidably engaged in the arc-shaped grooves, and the frame on the side of the slide block a and the slider is provided with a long groove, and the knob is slidably engaged in the long groove; when the knob is rotated, the two nut blocks move towards each other to engage with the second lead screw or the third lead screw; or when the knob is rotated, the two nut blocks move in opposite directions to disengage from the second lead screw or the third lead screw.

[0016] A further improvement of the present invention is that the drilling mechanism further includes a fourth motor, which is connected to a support a, and the support a is connected to a slide a; an annular mounting base is connected to the end of the fourth motor, and a drive gear is rotatably connected to the center of the annular mounting base, and the fourth motor is driven by the drive gear; several drill bits are rotatably connected in an annular array on the annular mounting base, and driven gears are connected to the drill bits, with the drive gear meshing with the driven gear, and the drill bit is detachably connected to the drill bit.

[0017] A further improvement of the present invention is that the milling mechanism further includes a fifth motor, which is connected to a support b, and the support b is connected to a slide b. A gearbox is connected to the power output end of the fifth motor. A sixth motor is connected inside the gearbox, and the sixth motor drives the gear transmission inside the gearbox. Two tool holders are connected to the power output end of the gearbox, and a large milling cutter and a small milling cutter are detachably connected to the tool holders.

[0018] A further improvement of the present invention is that the annular mounting base and one of the gearboxes are provided with mounting holes, and the top cone is connected to the mounting holes.

[0019] The beneficial effects of this invention are:

[0020] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention allows for simultaneous milling and drilling of the end face and inner circular surface of the flange on the large-diameter multi-port joint, which greatly improves the processing efficiency and ensures the processing accuracy.

[0021] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention, when clamping the large-diameter multi-port joint, inserts the top cone into the pipe of the joint, which plays a positioning role and further improves the machining accuracy.

[0022] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention has a clamping mechanism that enables the lower V-plate to move up and down, facilitating clamping and centering; at the same time, it can also enable the lower V-plate to rotate, facilitating the change of the direction of the large-diameter multi-port joint.

[0023] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention has X-axis feed mechanism and Y-axis feed mechanism that can control the forward or backward movement of drilling mechanism and milling mechanism, saving time and effort.

[0024] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention has an opening and closing nut assembly that can be used to control the drilling mechanism and the milling mechanism to feed individually or together, so as to meet the processing requirements of different types of joints.

[0025] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention adopts a multi-head mode for the drilling mechanism, and multiple connecting holes can be processed simultaneously.

[0026] The large-diameter multi-port joint multi-face synchronous milling and drilling device of the present invention has a large milling cutter and a small milling cutter on the milling mechanism that can rotate on their own or rotate with the gearbox. The large milling cutter is used to process the end face of the flange, and the small milling cutter is used to process the inner circular surface of the flange. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a partial structural diagram of the present invention.

[0029] Figure 3 This is a schematic diagram of the frame, X-axis feed mechanism and Y-axis feed mechanism of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the frame, X-axis feed mechanism and Y-axis feed mechanism of the present invention.

[0031] Figure 5 This is a schematic diagram of the clamping mechanism of the present invention.

[0032] Figure 6 This is a schematic diagram of the drilling mechanism and milling mechanism of the present invention.

[0033] Figure 7 This is a schematic diagram of the X-axis feed mechanism, Y-axis feed mechanism, drilling mechanism, and milling mechanism of the present invention.

[0034] Figure 8 This is a schematic diagram of the drilling mechanism of the present invention.

[0035] Figure 9 This is a schematic diagram of the milling mechanism of the present invention.

[0036] Figure 10 This is a schematic diagram of the milling mechanism of the present invention.

[0037] Figure 11 This is a schematic diagram of the opening and closing nut assembly of the present invention.

[0038] In the diagram: 1-Frame, 101-Leg, 102-Support Platform, 103-Dovetail Groove, 104-Rail, 105-Center Hole, 106-Long Groove, 2-Clamping Mechanism, 201-Lower V-Clamping Plate, 202-First Motor, 203-First Leadscrew, 204-Threaded Sleeve, 205-Rotating Support Block, 206-Guide Rod, 207-Guide Sleeve, 208-Servo Motor, 209-Upper V-Clamping Plate, 210-Threaded Column, 211-Pressure Plate, 212-Handle, 3-X-axis Feed Mechanism, 301-Slide A, 302-Second Motor, 303-Second Leadscrew, 304-Slide Rod A, 4-Y-axis Feed Mechanism, 401-Slide B, 402-Third Motor, 403-First... Three lead screws, 404-slide bar b, 405-slider, 5-drilling mechanism, 501-drill bit, 502-fourth motor, 503-support a, 504-ring mounting base, 505-drive gear, 506-drill base, 507-driven gear, 508-mounting hole, 6-milling mechanism, 601-large milling cutter, 602-small milling cutter, 603-fifth motor, 604-support b, 605-gearbox, 606-sixth motor, 607-tool holder, 7-top cone, 8-opening nut assembly, 801-knob, 802-nut block, 803-slide groove, 804-slide bar c, 805-arc groove, 9-large diameter multi-port connector, 901-flange, 902-connecting hole. Implementation

[0039] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1: As Figures 1-11 As shown, a large-diameter multi-port joint multi-face synchronous milling and drilling device includes a frame 1, a clamping mechanism 2, an X-axis feed mechanism 3, a Y-axis feed mechanism 4, a drilling mechanism 5, a milling mechanism 6, and a top cone 7. The clamping mechanism 2 is connected to the frame 1 at the center of the drilling mechanism 5 and the milling mechanism 6. The clamping mechanism 2 includes a lower V-plate 201 that can rotate and rise, and an upper V-plate 209 that is detachably connected to the lower V-plate 201. The X-axis feed mechanism 3 is connected to the frame 1, and slide blocks a301 are connected to both ends of the X-axis feed mechanism 3. The drilling mechanism 5 is connected to two slides a301 respectively, and the two drilling mechanisms 5 are arranged facing each other; the Y-axis feed mechanism 4 is connected to the frame 1, and slides b401 are connected to both ends of the Y-axis feed mechanism 4; the two milling mechanisms 6 are connected to two slides b401 respectively, and the two milling mechanisms 6 are arranged facing each other; the power output end of the drilling mechanism 5 is connected to several drill bits 501, the power output end of the milling mechanism 6 is connected to a large milling cutter 601 and a small milling cutter 602, and the top cone 7 is connected to the drilling mechanism 5 and the milling mechanism 6.

[0041] The frame 1 has legs 101 connected to its bottom, support platforms 102 connected between the legs 101, dovetail grooves 103 symmetrically arranged in the X direction at the top of the frame 1, rails 104 symmetrically connected in the Y direction, and a central hole 105 opened at the center of the frame 1.

[0042] The clamping mechanism 2 further includes a first motor 202, a first lead screw 203, and a threaded sleeve 204. A rotating support block 205 is connected to the top of the first lead screw 203, and guide rods 206 are connected to both sides of the rotating support block 205. A guide sleeve 207 is connected between the bottom of the frame 1 and the support platform 102, and the guide rods 206 are slidably fitted into the guide sleeve 207. The threaded sleeve 204 is connected to the central hole 105 and extends to the bottom of the frame 1. The first lead screw 203 is threaded into... The first motor 202 is connected to the bottom end of the first lead screw 203 via the threaded sleeve 204; a servo motor 208 is connected to the rotating support block 205, and the power output end of the servo motor 208 is connected to the lower V-plate 201; the upper V-plate 209 is connected to the lower V-plate 201 via bolt and nut assembly, and a threaded post 210 is threaded on the upper V-plate 209, with a pressure plate 211 connected to the bottom end of the threaded post 210 and a handle 212 connected to the top end of the threaded post 210.

[0043] The X-axis feed mechanism 3 further includes a second motor 302, a second lead screw 303, and a slide bar a304. The two ends of the second lead screw 303 and the slide bar a304 are rotatably connected to the two ends of the frame 1 in the X direction. The second motor 302 is connected to the end of the frame 1, and the power output shaft of the second motor 302 is driven and connected to the second lead screw 303. The slide block a301 is threadedly engaged with the second lead screw 303 and slidably engaged with the slide bar a304. The slide block a301 is slidably engaged with the dovetail groove 103 through the dovetail block at the bottom.

[0044] The Y-axis feed mechanism 4 further includes a third motor 402, a third lead screw 403, and a slide bar b404. The two ends of the third lead screw 403 and the slide bar b404 are rotatably connected to the two ends of the frame 1 in the Y direction. The third motor 402 is connected to the end of the frame 1 and is driven by the third lead screw 403. The bottom end of the slide block b401 is connected to a slider 405, which is threaded to the third lead screw 403 and slidably engaged with the slide bar b404. The bottom of the slide block b401 is slidably engaged with the track 104.

[0045] The sliding block a301 and the slider 405 are both connected to the sides of an opening and closing nut assembly 8. The opening and closing nut assembly 8 includes a knob 801 and two semi-circular nut blocks 802. The inner sides of the sliding block a301 and the slider 405 are provided with sliding grooves 803, and the two semi-circular nut blocks 802 slide in the sliding grooves 803. One end of each nut block 802 is connected to a sliding rod c804, and the inner side of the knob 801 is provided with two arc-shaped grooves 805. The slide bar c804 is slidably engaged with the arc-shaped groove 805. The frame 1 on the side of the slide block a301 and the slider 405 has a long groove 106. The knob 801 is slidably engaged with the long groove 106. When the knob 801 is rotated, the two nut blocks 802 move towards each other to engage with the second lead screw 303 or the third lead screw 403. Or when the knob 801 is rotated, the two nut blocks 802 move in opposite directions to disengage from the second lead screw 303 or the third lead screw 403.

[0046] The drilling mechanism 5 further includes a fourth motor 502, which is connected to a support a503, and the support a503 is connected to a slide a301. The end of the fourth motor 502 is connected to an annular mounting base 504, and a drive gear 505 is rotatably connected to the center of the annular mounting base 504. The fourth motor 502 is driven by the drive gear 505. Several drill bases 506 are rotatably connected in an annular array on the annular mounting base 504. A driven gear 507 is connected to the drill base 506, and the drive gear 505 meshes with the driven gear 507. The drill bit 501 is detachably connected to the drill base 506.

[0047] The milling mechanism 6 further includes a fifth motor 603, which is connected to a support b604. The support b604 is connected to a slide b401. A gearbox 605 is connected to the power output end of the fifth motor 603. A sixth motor 606 is connected inside the gearbox 605. The sixth motor 606 drives the gear transmission inside the gearbox 605. Two tool holders 607 are connected to the power output end of the gearbox 605. A large milling cutter 601 and a small milling cutter 602 are detachably connected to the tool holders 607.

[0048] The annular mounting base 504 and one of the gearboxes 605 are provided with mounting holes 508, and the top cone 7 is connected to the mounting hole 508.

[0049] The specific working principle of this embodiment is as follows:

[0050] S1. Centering: First, the large-diameter multi-port connector 9 is moved onto the lower V-plate 201 using the gantry crane in the workshop. The first motor 202 drives the first lead screw 203 to rotate, thereby causing the lower V-plate 201 to move upward. The second motor 302 and the third motor 402 work, the second lead screw 303 and the third lead screw 403 rotate, the two slides a301 move towards each other, the two slides b401 move towards each other, and the top cone 7 extends into the tube body of the large-diameter multi-port connector 9, completing the horizontal centering of the large-diameter multi-port connector 9.

[0051] S2. Clamping: The upper V-plate 209 is clamped on the top of the large-diameter multi-port connector 9 and connected to the lower V-plate 201 by bolts and nuts; after turning the handle 212, the threaded post 210 moves downward and the pressure plate 211 presses down on the top of the large-diameter multi-port connector 9, completing the clamping.

[0052] S3. Drilling: The second motor 302 works, the second lead screw 303 rotates, and the two slides a301 continue to move towards each other; the fourth motor 502 works, and the drill bit 501 rotates at high speed and contacts the flange 901 to complete the machining of the connecting hole 902.

[0053] S4. Milling: At the same time, the third motor 402 works, the third lead screw 403 rotates, and the two slides b401 move towards each other; the fifth motor 603 and the sixth motor 606 work, the large milling cutter 601 and the small milling cutter 602 rotate at high speed, or they can slowly rotate together with the gearbox 605. The large milling cutter 601 is used to process the end face of the flange 901, and the small milling cutter 602 is used to process the inner circle of the flange 901.

[0054] S5, Mode Adjustment: When machining a tee joint, only one end of the drilling mechanism 5 or the milling mechanism 6 needs to work; at this time, the knob 801 at one end can be rotated, and the two nut blocks 802 move in opposite directions to match the second lead screw 303 or the third lead screw 403, so that the feed of a single drilling mechanism 5 or milling mechanism 6 can be realized.

[0055] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A large-diameter multi-port joint multi-face synchronous milling and drilling device, characterized in that: It includes a frame (1), a clamping mechanism (2), an X-axis feed mechanism (3), a Y-axis feed mechanism (4), a drilling mechanism (5), a milling mechanism (6), and a top cone (7); The clamping mechanism (2) is connected to the frame (1) at the center of the drilling mechanism (5) and the milling mechanism (6). The clamping mechanism (2) includes a lower V-plate (201) that can rotate and be raised and lowered, and an upper V-plate (209) that is detachably connected to the lower V-plate (201). The X-axis feed mechanism (3) is connected to the frame (1), and slide blocks a (301) are connected to both ends of the X-axis feed mechanism (3). Two sets of drilling mechanisms (5) are respectively connected to the two slide blocks a (301), and the two sets of drilling mechanisms (5) are arranged facing each other. The X-axis feed mechanism (3) also includes a second motor (302), a second lead screw (303), and a slide bar a (304). The Y-axis feed mechanism (4) is connected to the frame (1), and slides b (401) are connected to both ends of the Y-axis feed mechanism (4). Two sets of milling mechanisms (6) are respectively connected to the two slides b (401), and the two sets of milling mechanisms (6) are arranged facing each other. The power output end of the drilling mechanism (5) is connected to several drill bits (501), the power output end of the milling mechanism (6) is connected to a large milling cutter (601) and a small milling cutter (602), and the top cone (7) is connected to the drilling mechanism (5) and the milling mechanism (6); The Y-axis feed mechanism (4) further includes a third motor (402), a third lead screw (403), and a slide bar b (404); the two ends of the third lead screw (403) and the slide bar b (404) are rotatably connected to the two ends of the frame (1) in the Y direction, the third motor (402) is connected to the end of the frame (1), and the third motor (402) is driven by the third lead screw (403); the bottom end of the slide block b (401) is connected to a slider (405), the slider (405) is threaded to the third lead screw (403) and slidably connected to the slide bar b (404), and the bottom of the slide block b (401) is slidably connected to the track (104); the second lead screw (303) and the third lead screw (403) are both bidirectional lead screws; The sides of the slide block a (301) and the slider (405) are both connected to an opening and closing nut assembly (8); the opening and closing nut assembly (8) includes a knob (801) and two semi-circular nut blocks (802), the inner sides of the slide block a (301) and the slider (405) are provided with a sliding groove (803), and the two semi-circular nut blocks (802) slide in the sliding groove (803); one end of the nut block (802) is connected to a sliding rod c (804), the inner side of the knob (801) is provided with two arc-shaped grooves (805), and the sliding rod c (804) Sliding fits into the arc groove (805), and the frame (1) on the side of the slide block a (301) and the slider (405) is provided with a long groove (106), and the knob (801) slides into the long groove (106); when the knob (801) is rotated, the two nut blocks (802) move towards each other to engage with the second lead screw (303) or the third lead screw (403); or when the knob (801) is rotated, the two nut blocks (802) move in opposite directions to disengage from the second lead screw (303) or the third lead screw (403).

2. The large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 1, characterized in that: The bottom of the frame (1) is connected to a support leg (101), and a support platform (102) is connected between the support legs (101). A dovetail groove (103) is symmetrically arranged in the X direction at the top of the frame (1), and a track (104) is symmetrically connected in the Y direction. A central hole (105) is opened at the center of the frame (1).

3. The large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 2, characterized in that: The clamping mechanism (2) further includes a first motor (202), a first lead screw (203), and a threaded sleeve (204); a rotating support block (205) is connected to the top of the first lead screw (203), and guide rods (206) are connected to both sides of the rotating support block (205). A guide sleeve (207) is connected between the bottom of the frame (1) and the support platform (102), and the guide rods (206) are slidably fitted into the guide sleeve (207); the threaded sleeve (204) is connected to the center hole (105) and extends to the bottom of the frame (1), and the first lead screw (203) is threaded... The first motor (202) is connected to the bottom end of the first lead screw (203) in conjunction with the threaded sleeve (204); the rotating support block (205) is connected to the servo motor (208), and the lower V-plate (201) is connected to the power output end of the servo motor (208); the upper V-plate (209) is connected to the lower V-plate (201) by bolt and nut assembly, and the upper V-plate (209) is threaded with a threaded post (210), the bottom end of the threaded post (210) is connected to a pressure plate (211), and the top end of the threaded post (210) is connected to a handle (212).

4. A large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 1 or 2, characterized in that: The two ends of the second lead screw (303) and slide rod a (304) are rotatably connected to the two ends of the frame (1) in the X direction. The second motor (302) is connected to the end of the frame (1), and the power output shaft of the second motor (302) is driven to the second lead screw (303). The slide a (301) is threaded to the second lead screw (303) and slidably connected to the slide rod a (304). The slide a (301) is slidably connected to the dovetail groove (103) through the dovetail block at the bottom.

5. The large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 1, characterized in that: The drilling mechanism (5) further includes a fourth motor (502), which is connected to a support a (503), and the support a (503) is connected to a slide a (301). The end of the fourth motor (502) is connected to an annular mounting base (504), and a drive gear (505) is rotatably connected to the center of the annular mounting base (504). The fourth motor (502) is driven by the drive gear (505). Several drill bases (506) are rotatably connected in an annular array on the annular mounting base (504). A driven gear (507) is connected to the drill base (506), and the drive gear (505) meshes with the driven gear (507). The drill bit (501) is detachably connected to the drill base (506).

6. The large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 5, characterized in that: The milling mechanism (6) also includes a fifth motor (603), which is connected to a support b (604). The support b (604) is connected to a slide b (401). A gearbox (605) is connected to the power output end of the fifth motor (603). A sixth motor (606) is connected inside the gearbox (605). The sixth motor (606) drives the gear transmission inside the gearbox (605). Two tool holders (607) are connected to the power output end of the gearbox (605). The large milling cutter (601) and the small milling cutter (602) are detachably connected to the tool holders (607).

7. The large-diameter multi-port joint multi-face synchronous milling and drilling device as described in claim 5, characterized in that: The annular mounting base (504) and one of the gearboxes (605) are provided with mounting holes (508), and the top cone (7) is connected to the mounting holes (508).

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