Multi-level intelligent drilling fixture and clamping method thereof

Abstract

The present invention relates to the technical field of receiver clamps, and in particular to a multi-horizontal plane intelligent drilling clamp and a clamping method thereof, wherein the multi-horizontal plane intelligent drilling clamp comprises: a clamp base, wherein the clamp base is provided with a large column; a centering component, wherein the centering component is arranged on the large column, wherein the centering component comprises a driving mechanism 1, a synchronization mechanism and a supporting block 1; a clamping component, wherein the clamping component comprises a driving mechanism 2, a clamping mechanism, a transmission mechanism and a supporting mechanism; the supporting block 2 on the supporting column of the present invention can be arbitrarily adjusted according to the height and size of the receiver to realize various hole processing with different positions, and at the same time, the receiver can be clamped in the forward direction and the reverse direction, which can meet the clamping requirements for drilling holes on the thin-walled surface of the receiver and the clamping requirements for processing spiral holes on the flange at the bottom of the receiver, and the practicability is very strong.

Description

Technical Field

[0001] The invention relates to the technical field of casing clamps, in particular to a multi-horizontal plane intelligent drilling clamp and a clamping method thereof. Background Art

[0002] Casings have important applications in aviation, aerospace, shipbuilding and other fields, and their processing quality directly affects the performance and reliability of the equipment. The receiver is a thin-walled part and is very easy to deform during processing. At present, when drilling holes in the receiver, in order to prevent the receiver from shaking, wax is generally filled inside the receiver to support the receiver. However, the above method has the following obvious defects: wax is sensitive to temperature, and when drilling, the temperature of the side wall of the receiver will increase, so that the wax will melt and form a cavity inside the receiver. This situation has a great impact on the supporting effect of the wax, and may reduce the inhibitory effect on the processing deformation of the thin wall of the receiver; when processing the receiver, holes on different circumferential horizontal planes are often processed by the above method. When drilling holes on different circumferential horizontal planes, it is often necessary to fill wax multiple times according to the processing requirements, which is time-consuming and labor-intensive; at the same time, when processing the spiral hole on the bottom flange of the receiver, the receiver is often required to be inverted, and the existing fixture is generally designed for the receiver in the upright state. When clamping the receiver in the inverted state, it is difficult to achieve stable clamping during processing. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-level intelligent drilling fixture and a clamping method thereof to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] On the one hand, a multi-level intelligent drilling fixture is provided, comprising:

[0006] A fixture base, wherein the fixture base is provided with a large column;

[0007] A centering assembly, which is arranged on the large column, and comprises a driving mechanism 1, a synchronization mechanism and a support block 1, wherein the driving mechanism 1 is used to drive the synchronization mechanism to move, thereby driving the support block 1 to move synchronously along the radial direction of the large column, thereby centering the casing to fix it; and

[0008] The clamping assembly includes a second driving mechanism, a clamping mechanism, a transmission mechanism and a supporting mechanism. The second driving mechanism is used to drive the clamping mechanism to move, the clamping mechanism is used to clamp the receiver, and the transmission mechanism is used to drive the supporting mechanism to support the side wall of the receiver when the clamping mechanism is clamping.

[0009] Preferably, the driving mechanism 1 includes a motor 1 and a rotating shaft, the motor 1 is arranged inside the large column, the motor 1 is used to drive the rotating shaft to rotate, the rotating shaft is connected to the inside of the large column through a fixed block 1 and a fixed block 2, and the rotating shaft and the large column are coaxially arranged.

[0010] Preferably, the synchronization mechanism includes a driving disc, a connecting rod 1 and a connecting rod 2, and there are three driving discs, which are arranged in sequence along the rotating shaft, and the connecting rod 1 and the connecting rod 2 are arranged around the large column, and the two ends of the connecting rod 1 are respectively connected to the support block 1 and the driving disc, and the two ends of the connecting rod 2 are respectively connected to the support block 1 and the outer end circumferential groove of the large column. When the rotating shaft drives the driving disc to rotate, the transmission of the connecting rod 1 and the connecting rod 2 will drive each support block 1 to move synchronously.

[0011] Preferably, the second driving mechanism includes a second motor, a transmission shaft and an electromagnetic block. The second motor is arranged on the clamp base. The second motor is used to drive the transmission shaft to rotate and then drive the clamping mechanism to move. The electromagnetic block is used to limit the transmission shaft after reaching a specified angle.

[0012] Preferably, the clamping mechanism includes a rotating disk at the bottom of the clamp, a triangular support frame 1, a fixed ring, a roller, a transmission block, a support column, a circular disc 1, a sliding block, a support block 2 and an annular pressure plate, the transmission shaft is used to drive the rotating disk at the bottom of the clamp to rotate, and the rotating disk at the bottom of the clamp is provided with a thin-walled circular ring with a slope, and the triangular support frame 1 is provided with a plurality of triangular support frames 1, and the plurality of triangular support frames 1 are arranged around the fixed ring, and the bottom of the triangular support frame 1 is provided with the roller, and the roller is used to drive the triangular support frame 1 to move along the thin-walled circular ring with a slope so as to realize the up and down movement of the triangular support frame 1 in the vertical direction. The transmission block is connected to the triangular support frame 1, and when the triangular support frame 1 moves up and down in the vertical direction, it will drive the transmission block to retract and retract along the groove of the circular disc 1, thereby driving the support column to move. The sliding block is connected to the support column and is used to drive the support block 2 to slide along the support column, and the annular pressure plate is used to further fix the casing after clamping is completed.

[0013] Preferably, the supporting mechanism includes a central supporting column, a supporting rod disc and a supporting rod, wherein the central supporting column is sleeved on the outside of the large column, the supporting rod disc is connected to the central supporting column, the supporting rod is arranged around the supporting rod disc, and the supporting rod is connected to the supporting column and is used to support the supporting column.

[0014] Preferably, the transmission mechanism includes a second triangular support frame, a wiring harness connection block, a wiring harness, a column connection block and a second disc, the second triangular support frame and the first triangular support frame are arranged correspondingly, the second triangular support frame and the first triangular support frame corresponding to each other are connected to each other, the second triangular support frame is connected to the wiring harness connection block, the second disc is sleeved on the central support column, the wiring harness connection block is connected to the groove of the second disc, the two ends of the wiring harness are respectively connected to the wiring harness connection block and the column connection block, the column connection block is connected to the support rod, and the column connection block is slidably connected to the support column.

[0015] Preferably, the support mechanism further comprises an auxiliary support plate, and the auxiliary support plate is used to support the curved surface of the receiver when the receiver is internally supported and clamped.

[0016] On the other hand, a clamping method is provided for clamping a thin-walled surface of a casing when drilling a hole using the multi-level intelligent drilling fixture described above, comprising the following steps:

[0017] A, workpiece loading, install the bottom end of the receiver on the fixture base;

[0018] B. Pre-center the workpiece and start the motor 1. The motor 1 drives the rotating shaft 1 to rotate. The rotating shaft 1 drives the connecting rod 1 to rotate. The movement of the connecting rod 1 and the connecting rod 2 drives the supporting block 1 to extend outward and contact the inner wall of the casing to fix the inside of the casing;

[0019] C, tighten the workpiece. After the pre-centering of the casing is completed, start the second motor. The second motor will drive the transmission shaft to rotate, thereby driving the bottom turntable of the fixture to rotate. When the bottom turntable of the fixture rotates, the roller will move along the sloped thin-walled circular ring to realize the vertical up and down movement of the triangular support frame 1. When the triangular support frame 1 moves up and down, it will drive the transmission block to extend and retract along the notch of the disc 1, thereby driving the support column to move, so that the support block 2 presses the thin inner wall to be processed of the casing;

[0020] D, press, press the receiver onto the fixture base through the circular pressure plate corresponding to the receiver.

[0021] On the other hand, a clamping method is provided, which is used for clamping a spiral hole in a bottom flange of a casing using the multi-horizontal plane intelligent drilling fixture, and comprises the following steps:

[0022] A. Start the second motor, which will drive the transmission shaft to rotate and drive the turntable at the bottom of the fixture to rotate. When the turntable at the bottom of the fixture rotates, the roller will move along the sloped thin-walled circular ring to achieve the vertical up and down movement of the first triangular support frame and drive the support column to expand outward;

[0023] B. Install the workpiece. Place an auxiliary support plate that fits the upper curved surface of the receiver on the central support column. Turn the receiver 180 degrees around the horizontal plane and then put it upside down on the auxiliary support plate.

[0024] C, pre-center the workpiece, start the motor 1, the motor 1 drives the rotating shaft 1 to rotate, the rotating shaft 1 drives the connecting rod 1 to rotate, and the movement of the connecting rod 1 and the connecting rod 2 drives the supporting block 1 to extend outward and contact with the inner wall of the casing to fix the inside of the casing;

[0025] D, tighten the workpiece, after the casing is pre-centered, start the second motor, the second motor will drive the transmission shaft to rotate, thereby driving the bottom turntable of the fixture to rotate, when the bottom turntable of the fixture rotates, the roller will move along the sloped thin-walled circular ring to achieve the vertical up and down movement of the triangular support frame 1, when the triangular support frame 1 moves up and down, it will drive the transmission block to extend and retract along the notch of the disc 1, thereby driving the support column to move, so that the support column clamps the outer and inner walls of the casing;

[0026] E. Press and tighten. Insert one end of the circular pressure plate into the center hole of the receiver and install it on the large column to further press and fix the receiver.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the support block 2 on the support column in the present invention can be adjusted arbitrarily according to the height and size of the receiver to realize the processing of various holes with different positions, so that when processing multiple holes in different positions, after determining the hole position, the support block 2 is adjusted to the corresponding coordinate position, and only one clamping is required to realize the processing of different horizontal surfaces, and there is no need to disassemble the receiver after processing one hole, and then readjust the fixture support height to process the remaining holes, thereby saving a lot of processing time; at the same time, the present invention can perform forward clamping and inverted clamping on the receiver, which can meet the clamping requirements for drilling holes on the thin-walled surface of the receiver and the clamping requirements for processing spiral holes on the flange at the bottom of the receiver, and has wide applicability and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The cross-sectional structure of the present invention is schematically shown Figure 1 ;

[0029] Figure 2 The cross-sectional structure of the present invention is schematically shown Figure 2 ;

[0030] Figure 3 The cross-sectional structure of the present invention is schematically shown Figure 3 ;

[0031] Figure 4 The cross-sectional structure of the present invention is schematically shown Figure 4 (The receiver is in an inverted clamping state);

[0032] Figure 5 It is a schematic diagram of the structure of the clamp base viewed from above of the present invention;

[0033] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0034] Figure 7 It is a front view structural schematic diagram of the present invention;

[0035] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the CC direction;

[0036] Fig. 9 for Figure 7 Schematic diagram of the cross-sectional structure in the middle DD direction;

[0037] Fig.10 The axial structure of the present invention is schematically shown Figure 1 ;

[0038] Fig.11 The casing installation structure of the present invention is shown in FIG. Figure 1 ;

[0039] Fig.12 The casing installation structure of the present invention is shown in FIG. Figure 2 (The receiver is in an inverted clamping state);

[0040] Fig.13 This is a schematic diagram of the connection structure of the triangular support frame 1, the fixing ring and the roller of the present invention;

[0041] Fig.14 It is a schematic diagram of the connection structure between the bottom turntable of the clamp and the sloped thin-walled circular ring of the present invention.

[0042] In the figure: 1-1 large column, 1-2 fixture base, 2-1 motor 1, 2-2 rotating shaft, 2-3 fixed block 1, 2-4 driving disc, 2-5 fixed block 2, 3-1 support block 1, 3-2 connecting rod 1, 3-3 connecting rod 2, 4-1 supporting column, 4-2 column connecting block, 4-3 sliding block, 4-4 supporting block 2, 5-1 support rod, 5-2 support rod disc, 6 casing, 7 central support column, 8-1 triangular support frame 2, 8-2 wiring harness connecting block, 8-3 disc 2, 9-1 triangular support frame 1, 9-2 disc 1, 9-3 transmission block, 9-4 fixing ring, 9-5 roller, 10 mounting sleeve, 11 wiring harness, 15-1 thin-walled circular ring with slope, 15-2 fixture bottom turntable, 16-1 transmission shaft, 16-2 electromagnetic holding block, 17 motor 2, 18 annular pressure plate, 19 auxiliary support disc. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-14 , the present invention provides a technical solution:

[0045] A multi-level intelligent drilling fixture, as shown in the attached manual Figure 1 As shown, including:

[0046] A fixture base 1-2, wherein the fixture base 1-2 is provided with a large column 1-1, and the fixture base 1-2 and the large column 1-1 are manufactured as one piece;

[0047] A centering assembly is arranged on the large column 1-1. The centering assembly includes a driving mechanism 1, a synchronization mechanism and a support block 1 3-1. The driving mechanism 1 is used to drive the synchronization mechanism to move so as to drive the support block 1 3-1 to move synchronously along the radial direction of the large column 1-1, thereby centering the casing 6 to fix it;

[0048] In this embodiment, both the support block 1 3-1 and the support block 2 4-4 are provided with pressure sensors. When the pressure detected by the pressure sensor provided on the support block 1 3-1 reaches a set value, the motor 1 2-1 will stop working. When the pressure detected by the pressure sensor provided on the support block 2 4-4 reaches a set value, the motor 2 17 will stop working.

[0049] The clamping assembly includes a second driving mechanism, a clamping mechanism, a transmission mechanism and a supporting mechanism. The second driving mechanism is used to drive the clamping mechanism to move, the clamping mechanism is used to clamp the receiver 6, and the transmission mechanism is used to drive the supporting mechanism to support the side wall of the receiver 6 when the clamping mechanism is clamping.

[0050] The driving mechanism 1 includes a motor 2-1 and a rotating shaft 2-2. The motor 2-1 is arranged inside the large column 1-1. The motor 2-1 is used to drive the rotating shaft 2-2 to rotate. The rotating shaft 2-2 is connected to the inside of the large column 1-1 through a fixed block 2-3 and a fixed block 2-5. In this embodiment, a fastener is arranged inside the fixed block 2-3 and the fixed block 2-5. The fastener is used to clamp the rotating shaft 2-2 to prevent it from rotating when the motor 2-1 stops. The rotating shaft 2-2 and the large column 1-1 are coaxially arranged.

[0051] In this embodiment, both the motor 1 2 - 1 and the motor 2 17 are AKM2G2x servo motors, which can accurately control their stop positions and are suitable for the usage scenarios of the present invention.

[0052] The synchronization mechanism includes a driving disc 2-4, a connecting rod 3-2 and a connecting rod 3-3. There are three driving discs 2-4, which are fixedly arranged in sequence along the rotating shaft 2-2. Therefore, when the rotating shaft 2-2 rotates, the driving disc 2-4 will be driven to rotate. The connecting rod 3-2 and the connecting rod 3-3 are arranged around the large column 1-1. The two ends of the connecting rod 3-2 are respectively connected to the support block 3-1 and the driving disc 2-4. The two ends of the connecting rod 3-3 are respectively connected to the support block 3-1 and the outer end circumferential groove of the large column 1-1. When the rotating shaft 2-2 drives the driving disc 2-4 to rotate, the transmission of the connecting rod 3-2 and the connecting rod 3-3 will drive each support block 3-1 to move synchronously.

[0053] Driving mechanism 2 includes motor 2 17, transmission shaft 16-1 and electromagnetic block 16-2. Motor 2 17 is arranged on the clamp base 1-2. Motor 2 17 is used to drive the transmission shaft 16-1 to rotate and then drive the clamping mechanism to move. In this embodiment, a transmission gear is arranged on the transmission shaft 16-1, and the transmission gear and the gear of the turntable 15-2 at the bottom of the clamp are engaged with each other. The electromagnetic block 16-2 is used to limit the transmission shaft 16-1 after reaching the specified angle.

[0054] The clamping mechanism includes a fixture bottom turntable 15-2, a triangular support frame 1 9-1, a disc 1 9-2, a transmission block 9-3, a fixing ring 9-4, a roller 9-5, a support column 4-1, a sliding block 4-3, a support block 2 4-4 and an annular pressure plate 18. The transmission shaft 16-1 is used to drive the fixture bottom turntable 15-2 to rotate. The fixture bottom turntable 15-2 is connected to a mounting sleeve 10. The fixture bottom turntable 15-2 is mounted on the fixture base 1-2 through the mounting sleeve 10. A thin-walled circular ring 15-1 with a slope is arranged on the bottom turntable 15-2, and a plurality of triangular support frames 9-1 are arranged, and the plurality of triangular support frames 9-1 are arranged around the fixed ring 9-4. A roller 9-5 is arranged at the bottom of the triangular support frame 9-1, and the roller 9-5 is used to drive the triangular support frame 9-1 to move along the thin-walled circular ring 15-1 with a slope so as to realize the up and down movement of the triangular support frame 9-1 in the vertical direction. The transmission block 9-3 is connected to the triangular support frame 1-9-1, when the triangular support frame 1-9-1 moves up and down in the vertical direction, it will drive the transmission block 9-3 to extend and retract along the groove of the disk 1-2, thereby driving the support column 4-1 to move. The support column 4-1 is used to support the outer thin-walled curved surface of the casing 6. In this embodiment, the disk where the clamp base 1-2 and the support column 4-1 are connected is provided with angle markings of 0 to 360 degrees, and a set of height markings (for adjusting the height of the support block 4-4) is provided on each support column 4-1. In this embodiment, the sliding block 4-3 is made of rubber material, and the sliding block 4-3 made of rubber material has a good damping effect. After adjusting the support block 4-4, the support block 4-4 can stay in a fixed position on the support column 4-1. The sliding block 4-3 is connected to the support column 4-1 and is used to drive the support block 4-4 to slide along the support column 4-1. The annular pressure plate 18 is used to further fix the casing 6 after the clamping is completed, as shown in the attached manual. Figure 1 As shown, the annular pressure plate 18 is installed on the clamp base 1-2 when the casing 6 is clamped in the forward direction, as shown in the appendix of the manual. Figure 4 As shown, when the casing 6 is clamped upside down, the annular pressure plate 18 is installed on the large column 1-1.

[0055] The supporting mechanism includes a central supporting column 7, a supporting rod 5-1 and a supporting rod disc 5-2. The central supporting column 7 is sleeved on the outside of the large column 1-1. The supporting rod disc 5-2 is connected to the central supporting column 7. The supporting rod 5-1 is arranged around the supporting rod disc 5-2. The supporting rod 5-1 is connected to the supporting column 4-1 and is used to support the supporting column 4-1. The central supporting column 7 is provided with an installation positioning groove for installing the disc 1 9-2. During installation, the disc 1 9-2 is installed first, and then a positioning sleeve is installed above the disc 1 9-2. The positioning sleeve is fixedly connected to the central supporting column 7 by screws. After the installation is completed, the disc 2 8-3 is installed. After the installation of the disc 2 8-3 is completed, a positioning sleeve is installed above the disc 2 8-3, and finally the support rod disc 5-2 is installed.

[0056] The transmission mechanism includes a triangular support frame 8-1, a wiring harness connecting block 8-2, a wiring harness 11, a column connecting block 4-2 and a disc 8-3. The triangular support frame 8-1 and the triangular support frame 9-1 have the same structure. The triangular support frame 8-1 and the triangular support frame 9-1 are correspondingly arranged. The corresponding triangular support frames 8-1 and 9-1 are connected to each other through a connecting rod. The triangular support frame 8-1 is connected to the wiring harness connecting block 8-2. The disc 8-3 is sleeved on the central support column 7. The wiring harness connecting block 8-2 is connected to the groove of the disc 8-3. The two ends of the wiring harness 11 are respectively connected to the wiring harness connecting block 8-2 and the column connecting block 4-2. The column connecting block 4-2 is connected to the support rod 5-1. The column connecting block 4-2 is slidably connected to the supporting column 4-1.

[0057] The supporting mechanism also includes an auxiliary supporting plate 19, the shape of which corresponds to the upper curved surface of the receiver 6, and the auxiliary supporting plate 19 is used to support the curved surface of the receiver 6 when the receiver 6 is internally supported and clamped.

[0058] Working principle:

[0059] (1) When performing the clamping for drilling a thin-walled hole on the casing 6, the following steps are included:

[0060] A, workpiece loading, install the bottom end of the casing 6 on the fixture base 1-2;

[0061] B. Pre-center the workpiece and start the motor 2-1. The motor 2-1 drives the rotating shaft 2-2 to rotate. The rotating shaft 2-2 drives the connecting rod 3-2 to rotate. The movement of the connecting rod 3-2 and the connecting rod 3-3 drives the supporting block 3-1 to extend outward and contact the inner wall of the casing 6 to fix the inside of the casing 6;

[0062] C, tighten the workpiece. After the casing 6 completes the pre-centering process, start the motor 2 17. The motor 2 17 will drive the transmission shaft 16-1 to rotate, thereby driving the bottom turntable 15-2 of the fixture to rotate. When the bottom turntable 15-2 of the fixture rotates, the roller 9-5 will move along the sloped thin-walled circular ring 15-1, thereby realizing the vertical up and down movement of the triangular support frame 1 9-1. When the triangular support frame 1 9-1 moves up and down, it will drive the transmission block 9-3 to extend and retract along the notch of the disc 1 9-2, thereby driving the support column 4-1 to move, and then the support block 2 4-4 presses against the thin inner wall to be processed of the casing 6;

[0063] D, press, the casing 6 is pressed onto the fixture base 1-2 through the annular pressure plate 18 corresponding to the casing 6.

[0064] (2) The clamping when machining the spiral hole on the bottom flange of the casing 6 includes the following steps:

[0065] A. Start the second motor 17. The second motor 17 will drive the transmission shaft 16-1 to rotate, thereby driving the bottom turntable 15-2 of the fixture to rotate. When the bottom turntable 15-2 of the fixture rotates, the roller 9-5 will move along the sloped thin-walled ring 15-1, thereby realizing the vertical up and down movement of the triangular support frame 1 9-1 and driving the support column 4-1 to expand outward;

[0066] B. Install the workpiece. Place an auxiliary support plate 19 that fits the upper curved surface of the casing 6 on the central support column 7. Turn the casing 6 180 degrees around the horizontal plane and then put it upside down on the auxiliary support plate 19.

[0067] C, pre-center the workpiece, start the motor 2-1, the motor 2-1 drives the rotating shaft 2-2 to rotate, the rotating shaft 2-2 drives the connecting rod 3-2 to rotate, and the movement of the connecting rod 3-2 and the connecting rod 3-3 drives the supporting block 3-1 to extend outward and contact with the inner wall of the casing 6 to fix the inside of the casing 6;

[0068] D, tighten the workpiece, after the casing 6 completes the pre-centering process, start the motor 2 17, the motor 2 17 will drive the transmission shaft 16-1 to rotate, thereby driving the bottom turntable 15-2 of the fixture to rotate, when the bottom turntable 15-2 of the fixture rotates, the roller 9-5 will move along the sloped thin-walled ring 15-1 to achieve the vertical up and down movement of the triangular support frame 1 9-1, when the triangular support frame 1 9-1 moves up and down, it will drive the transmission block 9-3 to extend and retract along the notch of the disc 1 9-2, thereby driving the support column 4-1 to move, so that the support column 4-1 clamps the outer and inner walls of the casing 6;

[0069] E, press, insert one end of the annular pressure plate 18 into the central hole of the casing 6 and install it on the large column 1-1 to further press and fix the casing 6.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-level intelligent drilling fixture, characterized in that: include: A fixture base, wherein the fixture base is provided with a large column; A centering assembly, which is arranged on the large column, and comprises a driving mechanism 1, a synchronization mechanism and a support block 1, wherein the driving mechanism 1 is used to drive the synchronization mechanism to move, thereby driving the support block 1 to move synchronously along the radial direction of the large column, thereby centering the casing to fix it; and A clamping assembly, the clamping assembly comprising a second driving mechanism, a clamping mechanism, a transmission mechanism and a supporting mechanism, the second driving mechanism is used to drive the clamping mechanism to move, the clamping mechanism is used to clamp the casing, and the transmission mechanism is used to drive the supporting mechanism to support the side wall of the casing when the clamping mechanism is clamping; The second driving mechanism comprises a second motor, a transmission shaft and an electromagnetic holding block. The second motor is arranged on the fixture base. The second motor is used to drive the transmission shaft to rotate and then drive the clamping mechanism to move. The electromagnetic holding block is used to limit the transmission shaft after reaching a specified angle. The driving mechanism comprises a rotating disk at the bottom of the clamp, a triangular support frame 1, a fixing ring, a roller, a transmission block, a supporting column, a circular disc 1, a sliding block, a supporting block 2 and an annular pressure plate, wherein the transmission shaft is used to drive the rotating disk at the bottom of the clamp to rotate, and a thin-walled circular ring with a slope is arranged on the rotating disk at the bottom of the clamp, and the triangular support frame 1 is provided with a plurality of triangular support frames 1, and the plurality of triangular support frames 1 are arranged around the fixing ring, and the roller is arranged at the bottom of the triangular support frame 1, and the roller is used to drive the triangular support frame 1 to move along the thin-walled circular ring with a slope so as to realize the up and down movement of the triangular support frame 1 in the vertical direction. The transmission block is connected to the triangular support frame 1, and when the triangular support frame 1 moves up and down in the vertical direction, it will drive the transmission block to retract and retract along the slot of the circular disc 1, thereby driving the supporting column to move. The sliding block is connected to the supporting column and is used to drive the support block 2 to slide along the supporting column, and the annular pressure plate is used to further fix the casing after the clamping is completed.

2. The multi-level intelligent drilling fixture according to claim 1, characterized in that: The driving mechanism 1 includes a motor 1 and a rotating shaft. The motor 1 is arranged inside the large column. The motor 1 is used to drive the rotating shaft to rotate. The rotating shaft is connected to the inside of the large column through a fixed block 1 and a fixed block 2. The rotating shaft and the large column are coaxially arranged.

3. The multi-level intelligent drilling fixture according to claim 2, characterized in that: The synchronization mechanism includes a driving disc, a connecting rod 1 and a connecting rod 2. There are three driving discs, which are arranged in sequence along the rotating shaft. The connecting rod 1 and the connecting rod 2 are arranged around the large column. The two ends of the connecting rod 1 are respectively connected to the support block 1 and the driving disc, and the two ends of the connecting rod 2 are respectively connected to the support block 1 and the outer end circumferential groove of the large column. When the rotating shaft drives the driving disc to rotate, the transmission of the connecting rod 1 and the connecting rod 2 will drive each support block 1 to move synchronously.

4. The multi-level intelligent drilling fixture according to claim 3, characterized in that: The support mechanism includes a central support column, a support rod disc and a support rod, wherein the central support column is sleeved on the outside of the large column, the support rod disc is connected to the central support column, the support rod is arranged around the support rod disc, and the support rod is connected to the support column and is used to support the support column.

5. The multi-level intelligent drilling fixture according to claim 4, characterized in that: The transmission mechanism includes a second triangular support frame, a wiring harness connection block, a wiring harness, a column connection block and a second disc. The second triangular support frame and the first triangular support frame are correspondingly arranged, and the corresponding second triangular support frame and the first triangular support frame are connected to each other. The second triangular support frame is connected to the wiring harness connection block, the second disc is sleeved on the central support column, the wiring harness connection block is connected to the notch of the second disc, the two ends of the wiring harness are respectively connected to the wiring harness connection block and the column connection block, the column connection block is connected to the support rod, and the column connection block is slidably connected to the support column.

6. The multi-level intelligent drilling fixture according to claim 5, characterized in that: The support mechanism also includes an auxiliary support plate, which is used to support the curved surface of the casing when the casing is internally supported and clamped.

7. A clamping method for clamping a thin-walled casing surface when drilling a hole using the multi-level intelligent drilling fixture of claim 5, characterized in that: The steps include: A, workpiece loading, install the bottom end of the receiver on the fixture base; B. Pre-center the workpiece and start the motor 1. The motor 1 drives the rotating shaft 1 to rotate. The rotating shaft 1 drives the connecting rod 1 to rotate. The movement of the connecting rod 1 and the connecting rod 2 drives the supporting block 1 to extend outward and contact the inner wall of the casing to fix the inside of the casing; C, tighten the workpiece. After the pre-centering of the casing is completed, start the second motor. The second motor will drive the transmission shaft to rotate, thereby driving the bottom turntable of the fixture to rotate. When the bottom turntable of the fixture rotates, the roller will move along the sloped thin-walled circular ring to realize the vertical up and down movement of the triangular support frame 1. When the triangular support frame 1 moves up and down, it will drive the transmission block to extend and retract along the notch of the disc 1, thereby driving the support column to move, so that the support block 2 presses the thin inner wall to be processed of the casing; D, press, press the receiver onto the fixture base through the circular pressure plate corresponding to the receiver.

8. A clamping method for clamping a spiral hole in a bottom flange of a casing using a multi-level intelligent drilling fixture as claimed in claim 6, characterized in that: The steps include: A. Start the second motor, which will drive the transmission shaft to rotate and drive the turntable at the bottom of the fixture to rotate. When the turntable at the bottom of the fixture rotates, the roller will move along the sloped thin-walled circular ring to achieve the vertical up and down movement of the first triangular support frame and drive the support column to expand outward; B. Install the workpiece. Place an auxiliary support plate that fits the upper curved surface of the receiver on the central support column. Turn the receiver 180 degrees around the horizontal plane and then put it upside down on the auxiliary support plate. C, pre-center the workpiece, start the motor 1, the motor 1 drives the rotating shaft 1 to rotate, the rotating shaft 1 drives the connecting rod 1 to rotate, and the movement of the connecting rod 1 and the connecting rod 2 drives the supporting block 1 to extend outward and contact with the inner wall of the casing to fix the inside of the casing; D, tighten the workpiece, after the casing is pre-centered, start the second motor, the second motor will drive the transmission shaft to rotate, thereby driving the bottom turntable of the fixture to rotate, when the bottom turntable of the fixture rotates, the roller will move along the sloped thin-walled circular ring to achieve the vertical up and down movement of the triangular support frame 1, when the triangular support frame 1 moves up and down, it will drive the transmission block to extend and retract along the notch of the disc 1, thereby driving the support column to move, so that the support column clamps the outer and inner walls of the casing; E. Press and tighten. Insert one end of the circular pressure plate into the center hole of the receiver and install it on the large column to further press and fix the receiver.

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