Intelligent fixture for intelligent manufacturing production line and clamping method

Abstract

The application discloses an intelligent fixture for an intelligent manufacturing production line and a clamping method, and belongs to the technical field of fixtures. The method sets the body as a conical table structure, connects the lower end of the conical table structure with a connecting flange, and sets an annular shell on the periphery of the conical table structure; the conical table structure is provided with a clamping workpiece bonding expansion sleeve and a calibration piece, the inside of the conical table structure is provided with a pull rod and a piston for implementing measurement, various circuits and related components are arranged in the annular shell, and the flange is used for being connected with a machine tool. The fixture can solve the problem of accurately and real-timely monitoring the machining state and the clamping force of a part in a precision machining process.

Description

Technical Field

[0001] The present invention belongs to the technical field of fixtures, and in particular relates to an intelligent fixture and a clamping method for an intelligent manufacturing production line. Background Art

[0002] As an important device to ensure the correct positioning and processing stability of parts, the performance of the fixture seriously affects the processing quality of the parts. Precision machining technology places higher demands on the performance of the fixture. Traditional fixture clamping relies heavily on the skills and experience of the operator, and the operator's subjective consciousness is relatively obvious, which greatly limits the processing accuracy of the parts, resulting in bottlenecks in the improvement of precision consistency, processing efficiency and yield rate under batch manufacturing. With the continuous development of new sensing technologies, signal recognition and processing algorithms, a closed-loop control system is formed by integrating sensors and setting actuators inside the fixture, which makes it possible for smart fixtures to execute autonomously or interact with machine tools. Smart fixtures are widely used in the fields of automobiles, ships, aerospace, machining, etc., such as the processing of composite materials in the aerospace field, the processing of high-performance bearings, and the processing of automobile engines. Part clamping force detection and machining vibration status detection are two crucial aspects of the intelligent process. Reasonable clamping force can prevent parts from moving, falling off, or deforming during machining, ensuring machining accuracy. Vibration during machining can cause problems such as cutting force fluctuations and increased cutting temperature, which in turn affect machining quality. Long-term vibration can also increase the wear of fixtures, cutting tools, and machine tool components, reducing equipment life. Therefore, it is very important to accurately monitor the clamping force and machining vibration status of parts.

[0003] Domestic research on clamping force mainly focuses on aspects such as clamping force error compensation, fixture component layout, adaptive clamping force, and factors affecting clamping force. For example, the literature "Zhao Guoqiang, Xue Jinxue, Wang Yipeng, et al. Research on adaptive control system of clamping force of electromagnetic centerless clamp [J]. China Testing, 2022, 48(09): 145-151." and "Zhang Ning. Deformation-compliant clamping method for thin shell parts [D]. Dalian: Dalian University of Technology, 2019." respectively introduces the clamping force adaptive control technology and the clamping component position layout optimization method. These methods cannot accurately measure the clamping force under processing conditions. A small number of studies based on sensor technology have studied the problem of accurate measurement of clamping force, such as the literature "Jia Meng. Design of automatic indexing chuck suitable for rapid processing of pipe joints [D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2021." A chuck wireless force measurement device based on S-type pressure sensor was designed, but the sensor was not integrated into the fixture, and the signal could not be fed back to the machine tool for feedback adjustment of the clamping force. The paper “HAOYU Z, BO T, WENCHAO L, et al. Plc-Based Aerospace Thin-Wall Part Processing Fixture[J]. IOP Conference Series: Materials Science and Engineering, 2020, 782:022055 (7 pp.)-022055 (7 pp.).” designed a structure that can adjust the clamping force at any time by placing a pressure sensor at the end of the pressure plate. However, this structure can only be used under static conditions.

[0004] During machining, vibration often occurs due to the influence of multiple factors, including the machine tool, cutting tool, workpiece, and cutting forces. Current research has not considered the vibration of the fixture and part when the fixture is holding the part, nor has it considered the multi-scale characteristics of tool and fixture wear across different signal dimensions. This makes it impossible to effectively exploit multi-sensor fusion features, resulting in incomplete and inadequate sensor data collection. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an intelligent fixture and clamping method for an intelligent manufacturing production line to solve the problems in the prior art such as low degree of integration, limited scope of use and insufficient monitoring data.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An intelligent fixture for an intelligent manufacturing production line comprises a body, the lower end of which is connected to a connecting flange;

[0008] The main body includes a wedge-shaped structure, a truncated cone structure and a support structure integrally connected from top to bottom, and the lower end of the support structure is connected to the connecting flange; a bonding expansion sleeve is provided outside the wedge structure, and a calibration piece is provided outside the bonding expansion sleeve;

[0009] A pull rod is inserted into the wedge-shaped structure and the truncated cone structure. The upper end of the pull rod is an annular end face, which contacts the upper end plane of the bonding sleeve. A force-sensitive chip and a three-axis vibration sensor are installed on the side wall of the pull rod. The lower end of the pull rod is connected to a piston, which is set in the body and the connecting flange.

[0010] An annular shell is provided on the support structure, and a switch signal transfer circuit, a sensor signal transfer circuit and a data processing circuit are provided in the annular shell. The data processing circuit is wirelessly connected to a numerical control system, the sensor signal transfer circuit is connected to a force-sensitive chip and a three-axis vibration sensor via electrical signals, and the sensor signal transfer circuit is connected to the data processing circuit via electrical signals; the switch signal transfer circuit is connected to the data processing circuit via electrical signals; an annular cover is provided at the upper end of the annular shell;

[0011] A gap for storing oil is provided between the piston and the frustum structure, and between the piston and the connecting flange;

[0012] A second oil delivery hole and an oil delivery pipeline are provided in the connecting flange, a first oil delivery hole is opened in the supporting structure, and the first oil delivery hole and the second oil delivery hole are connected; one end of the oil delivery pipeline is connected to the gap between the piston and the connecting flange, and the second oil delivery hole and the first oil delivery hole are connected to the gap between the piston and the frustum structure.

[0013] A further improvement of the present invention is:

[0014] Preferably, a stress plane and an anti-rotation plane are provided on the side wall of the pull rod; the force-sensitive chip and the triaxial vibration sensor are mounted on the stress plane; a hollow screw is inserted into the truncated cone structure, a wire is inserted into the hollow screw, the wire is connected to the triaxial vibration sensor and the force-sensitive chip via a wire adapter plate; the wire is connected to the sensor signal adapter circuit;

[0015] An anti-rotation screw is inserted into the truncated cone structure, and the inner end of the anti-rotation screw abuts against the anti-rotation plane;

[0016] Preferably, the bonding expansion sleeve is an annular structure, the inner ring is a wedge-shaped surface, and the outer ring is a cylindrical tensioning surface; the calibration piece is a thick-walled cylindrical structure, the inner ring is a tensioning contact surface, and the outer ring is a clamping surface;

[0017] The wedge surface contacts the wedge structure, and the cylindrical expansion surface contacts the expansion contact surface;

[0018] When the fixture clamps the workpiece, the workpiece is sleeved outside the clamping surface.

[0019] Preferably, the wedge-shaped structure and the truncated cone structure are connected in one piece through a transition structure, the transition structure is sheathed with a support member, and the support member is in contact with the lower portion of the calibration member.

[0020] Preferably, a circular countersunk hole is provided in the inner ring of the support member, and the upper surface of the support member has a supporting plane around the circumferential array.

[0021] Preferably, the piston comprises an upper cylinder, a circular step and a bottom cylinder integrally connected from top to bottom;

[0022] The connecting flange includes a base, and a connecting portion protruding upward is provided at the center of the base;

[0023] The upper cylinder is inserted into the truncated cone structure, the tie rod is inserted into the upper cylinder, and the tie rod and the upper cylinder are detachably connected; the circular step is arranged in the supporting structure;

[0024] The connecting part is embedded in the supporting structure and is below the circular step; a circular groove is formed on the connecting part, and the bottom cylinder is inserted into the circular groove;

[0025] The piston and the connecting flange are detachably connected.

[0026] Preferably, sealing rings are provided between the upper cylinder and the truncated cone structure, between the circular step and the supporting structure, between the connecting part and the supporting structure, and between the bottom cylinder and the inner wall of the cylindrical groove.

[0027] Preferably, a camera and a lithium battery are installed in the annular shell, a camera hole is opened on the annular cover, and a protective glass is provided on the camera hole.

[0028] Preferably, the connecting flange is provided with connecting holes and connecting pieces for connecting to the supporting structure, and the connecting flange is provided with connecting holes and connecting pieces for connecting to the machine tool.

[0029] A method for clamping an intelligent fixture for an intelligent manufacturing production line includes the following steps:

[0030] S1, install the entire fixture on the machine tool through the connecting flange;

[0031] S2, placing the processed part on the calibration part;

[0032] S3: Hydraulic oil is pressed into the body through the second oil delivery hole and the first oil delivery hole. The hydraulic oil presses the piston downward, and the piston drives the pull rod downward. The pull rod applies pressure to the bonding expansion sleeve through the annular end surface. The bonding expansion sleeve expands due to the action of the wedge structure. Under the action of the bonding expansion sleeve, the calibration piece is deformed radially to clamp the workpiece.

[0033] S4, when the workpiece is being clamped, the tension on the pull rod increases, and the force-sensitive chip detects the change in the tension of the pull rod and transmits the tension information to the CNC system through the sensor signal conversion circuit and the data processing circuit. When the clamping force is insufficient, the CNC system increases the oil pressure input to the second oil delivery hole by controlling the hydraulic system of the machine tool. When the clamping force is too large, the oil pressure input to the second oil delivery hole is reduced until the oil pressure reaches the desired value;

[0034] During the machining process, the three-axis vibration sensor detects the vibration signal, centrifugal acceleration, and dynamic balance status of the intelligent fixture in real time. The vibration signal, centrifugal acceleration, and dynamic balance status information are transmitted to the CNC system through the data processing circuit. The CNC system adjusts the machining parameters based on the information to ensure that the speed of the machined part reaches the predetermined value.

[0035] During the machining process, the three-axis vibration sensor also detects abnormal peak signals and abnormal fluctuation signals. If abnormal peak signals or abnormal fluctuation signals occur, an alarm will be issued and the signal will be transmitted to the CNC system, causing the CNC system to shut down.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention discloses an intelligent fixture for intelligent manufacturing production lines to solve the problem of accurately and in real time monitoring the machining state and the clamping force on parts during precision machining. In response to the need for accurate monitoring of machining vibration and the clamping force on parts during machining, the fixture of the present invention has the following advantages:

[0038] (A) The wedge-shaped surface fit and the cylindrical clamping method of the calibration component provide an efficient, precise, and reliable clamping solution for the machining process. This clamping structure not only achieves precise control of the clamping force by converting the functional relationship between axial tension and radial clamping force, but also ensures uniform distribution of the clamping force, significantly improving the deformation of the machined part during the clamping process. The evenly distributed clamping force also helps reduce wear and stress concentration on the fixture itself, extending the fixture's service life.

[0039] (B) By integrating a force-sensitive chip and a triaxial vibration sensor into the fixture, simultaneous measurement of clamping force and vibration is achieved, improving the fixture's overall compactness and ease of installation. ① The collected sensor signals directly reflect the clamping force, vibration, and centrifugal acceleration of the fixture's rotation during machining. The real-time and accurate measurement of the clamping force enables the CNC system to automatically adjust the clamping force to the appropriate range. Centrifugal acceleration and vibration signals can accurately sense part rotation speed and abnormal vibration, monitoring the operational stability of the intelligent fixture and the part being machined. ② By monitoring the force and vibration of the tie rod in real time, the system can promptly identify potential safety hazards and prevent damaging accidents such as tool collisions and breakage, acting similarly to an automobile airbag. ③ The vibration and centrifugal acceleration signals collected by the triaxial vibration sensor can be used to determine the dynamic balance of the part during machining. Dynamic imbalance is promptly fed back to the CNC system, allowing adjustments to machining parameters to ensure part operational stability and machining accuracy. ④ By combining with intelligent algorithms, it can be used for predictive maintenance and fixture fault diagnosis. For example, it can be used as an evaluation indicator for fixture life prediction to avoid premature fixture scrapping or fixture fatigue failure causing processing accidents. It can also increase the service life of the fixture, reduce processing costs during the processing, and reduce the time required to replace the fixture.

[0040] (C) Using QR code recognition technology on processed parts can quickly and accurately record and track information throughout the entire machining process, including part number, dimensional parameters, technical requirements, machining status, completed process steps, ongoing processes, and pending processes. The CNC system can then automatically retrieve the NC code for the part being machined, helping to automate and intelligentize the machining process and improve production efficiency. By tracking the machining process, production plans can be adjusted promptly, production status can be monitored in real time, problems can be identified and resolved promptly, and machining quality can be improved.

[0041] (D) Through wireless transmission technology between circuits, the intelligent fixture can achieve seamless connection with the machine tool control system, making the entire machining process more automated and intelligent. Wireless transmission, unlike wired transmission, eliminates the need for wired wiring and reduces safety hazards caused by improper or damaged wiring. It also makes the design, installation, and maintenance of the fixture more flexible, allowing it to rotate as a whole with the machine tool spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of the intelligent fixture;

[0043] Figure 2 This is the forward axial sectional view of the intelligent fixture;

[0044] Figure 3This is the lateral axial section view of the intelligent fixture;

[0045] Figure 4 Schematic diagram of the support and calibration parts structure;

[0046] Figure 5 This is a schematic diagram of the internal structure of the wireless transmission component housing;

[0047] Figure 6 This is a schematic diagram of the wireless transmission component cover structure.

[0048] Among them, 1. calibration part; 2. bonding expansion sleeve; 3. pull rod; 4. support part; 5. body; 6. piston; 7. connecting flange; 8. support fixing screw; 9. anti-rotation screw; 10. first metal flat gasket; 11. first silicone gasket; 12. hollow screw; 13. second metal flat gasket; 14. second silicone gasket; 15. first cylindrical pin; 16. second cylindrical pin; 17. connecting screw; 18. set screw; 19. first fixing screw; 20. clamp top screw; 21. first O-ring; 22. second O-ring; 23. third O-ring; 24. fourth O-ring; 25. fifth O-ring; 26. sixth O-ring; 27. force sensitive chip; 28. three-axis vibration sensor; 29. Wire adapter plate; 30, annular shell; 31, first gasket; 32, annular cover; 33, second gasket; 34, data processing circuit; 35, external hexagonal hollow bolt; 36, third metal flat gasket; 37, third silicone gasket; 38, seventh O-ring; 39, fourth silicone gasket; 40, fourth metal flat gasket; 41, thin nut; 42, waterproof self-locking switch; 43, switch metal flat gasket; 44, nut; 45, lithium battery; 46, second fixing screw; 47, fifth metal flat gasket; 48, camera; 49, protective glass; 50, battery transfer circuit; 51, sensor signal transfer circuit; 52, switch signal transfer circuit; 53, first screw; 54, second screw; 55, The third screw; 56, the sixth metal flat gasket; 57, the fifth silicone gasket; 58, the circular countersunk hole; 59, the countersunk hole; 60, the oil drain hole; 61, the supporting plane; 62, the wedge-shaped structure; 63, the first threaded hole; 64, the anti-rotation threaded hole; 65, the wire threaded hole; 66, the wire groove; 67, the oblique hole; 68, the first oil delivery hole; 69, the first through hole; 70, the top screw through hole; 71, the second through hole; 72, the second threaded hole; 73, the first pin hole; 74, the third threaded hole; 75, the fourth threaded hole; 76, the annular groove; 77, the second pin hole; 78, the fifth threaded hole; 79, the upper surface; 80, the lower surface; 81, the sixth threaded hole; 82, the seventh threaded hole; 83, the oil pipeline; 84, the first Second oil delivery hole; 85, third pin hole; 86, countersunk groove; 87, third through hole; 88, wedge surface; 89, cylindrical tightening surface; 90, hexagonal groove; 91, annular end face; 92, anti-rotation plane; 93, stress plane; 94, thread; 95, tightening contact surface; 96, clamping surface; 97, boss; 98, fourth through hole; 99, eighth threaded hole; 100, battery slot; 101, wire hole; 102, switch hole; 103, camera hole; 104, fifth through hole; 501, transition structure; 502, frustum structure; 503, support structure; 601, upper cylinder; 602, circular step; 603, bottom cylinder; 701, connecting part; 702, base; 703, circular groove. DETAILED DESCRIPTION

[0049] The present invention is described in further detail below with reference to the accompanying drawings:

[0050] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0051] The intelligent clamp designed in the present invention mainly includes a clamp body, a sensor component and a wireless transmission component.

[0052] The clamp body includes: a support member 4, a body 5, a piston 6, a connecting flange 7, a support member fixing screw 8, a first cylindrical pin 15, a second cylindrical pin 16, a connecting screw 17, a set screw 18, a first fixing screw 19, a clamp top screw 20, and O-rings 21-26; wherein the body 5 is the main component of the clamp, and has a wedge structure 62, a first threaded hole 63, an anti-rotation threaded hole 64, a wire threaded hole 65, a wire groove 66, an inclined hole 67, a first oil delivery hole 68, a first through hole 69, a top screw through hole 70, a second through hole 71, a second threaded hole 72, a first pin hole 73, a third threaded hole 74 and other structures, such as Figure 2 and Figure 3 As shown. The support member 4 includes a circular countersunk hole 58, a countersunk hole 59, an oil drain hole 60, and a support plane 61. Figure 4 As shown in the figure, the piston 6 is a rotating body structure, mainly including the fourth threaded hole 75, annular groove 76, second pin hole 77, fifth threaded hole 78, upper surface 79, and lower surface 80. The connecting flange 7 is a rotating body component, mainly including the sixth threaded hole 81, seventh threaded hole 82, oil pipeline 83, second oil hole 84, third pin hole 85, countersunk groove 86, and third through hole 87. The support member fixing screw 8, first cylindrical pin 15, second cylindrical pin 16, connecting screw 17, set screw 18, first fixing screw 19, clamp jackscrew 20, and O-rings 21-26 are all independent parts.

[0053] The sensor assembly includes: a calibration component 1, an adhesive expansion sleeve 2, a pull rod 3, an anti-rotation screw 9, a first metal flat washer 10, a first silicone washer 11, a hollow screw 12, a second metal flat washer 13, a second silicone washer 14, a force-sensitive chip 27, a triaxial vibration sensor 28, and a wire adapter plate 29. The pull rod 3 is the tension component, with a hexagonal socket 90, an annular end face 91, an anti-rotation flat surface 92, a stress plane 93, and threads 94. The anti-rotation screw 9, first metal flat washer 10, first silicone washer 11, hollow screw 12, second metal flat washer 13, and second silicone washer 14 are independent parts. The force-sensitive chip 27, triaxial vibration sensor 28, and wire adapter plate 29 need to be glued and fixed to the stress plane 93.

[0054] The wireless transmission component includes an annular shell 30, a first gasket 31, an annular cover 32, a second gasket 33, a data processing circuit 34, an external hexagonal hollow bolt 35, a third metal flat gasket 36, a third silicone gasket 37, an O-ring 38, a fourth silicone gasket 39, a fourth metal flat gasket 40, a thin nut 41, a waterproof self-locking switch 42, a switch metal flat gasket 43, a nut 44, a lithium battery 45, a second fixing screw 46, a fifth metal flat gasket 47, a camera 48, a protective glass 49, a battery transfer circuit 50, a sensor signal transfer circuit 51, a switch signal transfer circuit 52, a first screw 53, a second screw 54, a third screw 55, a sixth metal flat gasket 56, and a fifth silicone gasket 57.

[0055] The main body 5 comprises, from top to bottom, a wedge-shaped structure 62, a transition structure 501, a truncated cone structure 502, and a support structure 503, all integrally connected. The truncated cone structure 502 is shaped like a frustum, similar to a trumpet. The wedge-shaped structure 88 is also a truncated cone. The transition structure 501 and the support structure 503 are both cylindrical structures. The diameters of the lower end surfaces of the wedge-shaped structure 88 and the truncated cone structure 502 are both larger than those of the upper end surfaces. The bonding sleeve 2 is fixedly mounted on the outside of the wedge-shaped structure 88. The calibration component 1 is removably mounted on the outside of the bonding sleeve 2. The support component 4 is fixedly mounted on the outside of the transition structure 501. The bottom of the calibration component 1 contacts the support component 4, which is fixedly connected to the main body 5 via support component fixing screws 8. The lower end of the support structure 503 is connected to the connecting flange 7.

[0056] For further information, see Figure 2 The right side of the detail diagram shows that the inner surface of the adhesive expansion sleeve 2 is closely matched with the wedge-shaped structure 62 of the body 5, and the outer surface of the adhesive expansion sleeve 2 is a cylindrical tightening surface 89 that cooperates with the tightening contact surface 95 of the calibration piece 1. Figure 4 The calibration piece 1 is a thick-walled annular cylindrical structure, the inner ring is the tightening contact surface 95, and the outer ring is the clamping surface 96.

[0057] See also Figure 4, the support 4 is annular structure as a whole, sleeved on the outside of the transition structure 501, and the inner ring of the support 4 is provided with a circular counterbore 58 around the circumference, so that the inside of the support 4 is stepped; the support 4 is provided with four countersunk head holes 59 around the circumference, for mounting the fixing screw 8, and the fixing screw 8 connects the support 4 and the conical frustum 502; the upper end face of the support 4 is provided with protruding support planes 61 in an array around the circumference, by arranging the support planes in an array structure, the size of the planes can be appropriately reduced under the premise of meeting the basic support function, so that the over-restraint condition can be avoided as much as possible, and the machining precision of the whole plane can be appropriately reduced. When the calibration piece 1 is sleeved on the outside of the adhesive expansion sleeve 2, the bottom can be supported by the support planes 61. When the adhesive expansion sleeve 2 is forced to move downward, the arrangement of the circular counterbore 58 can provide a certain space for it.

[0058] Referring to Figure 2 and Figure 3 , the lower end of the conical frustum structure 502 is integrally connected with the support structure 503, and the inside is provided with a stepped through hole along the axial direction for placing the pull rod 3 and the piston 6; the upper end of the conical frustum structure 502 is provided with a first threaded hole 63, which is used for connecting with the support fixing screw 8, so as to fix the support 4 to the body 5; the side wall of the conical frustum structure 502 is provided with an inclined hole 67, which is convenient for disassembling the clamp, and is also provided with an anti-rotation threaded hole 64 and a wire threaded hole 65 perpendicular to the axial direction.

[0059] Referring to Figure 2 and Figure 3The pull rod 3 in the sensor assembly is inserted into the body 5 from the upper end of the body 5. The upper end of the pull rod 3 is provided with a hexagonal groove 90. The pull rod 3 is also provided with an annular end face 91. The diameter of the annular end face 91 is larger than the main structure diameter of the pull rod 3. The annular end face 91 is tightly matched with the upper end of the bonding sleeve 2 to maintain the axial balance of the bonding sleeve 2; an anti-rotation plane 92 and a stress plane 93 are provided on the side wall of the middle part of the pull rod 3. The stress plane 93 is provided with a force-sensitive chip 27, a three-axis vibration sensor 28 and a wire adapter plate 2 9. Both the force-sensitive chip 27 and the three-axis sensor 28 are provided with lead welding points, which are electrically connected to the wire adapter plate 29. The anti-rotation screw 9 and the hollow screw 12 are respectively inserted from the outer surface of the truncated cone structure 502 into the truncated cone structure 502, wherein the anti-rotation screw 9 is inserted from the anti-rotation threaded hole 64 provided on the truncated cone structure 502, and the hollow screw 12 is inserted from the wire threaded hole 65 provided on the truncated cone structure 502. The hollow screw 12 is used to insert the wire, which is electrically connected to the wire adapter plate 29. The other end of the wire is connected to the sensor signal conversion circuit 51 in the annular shell 30, and the middle part is stuck in the wire groove 66, which fixes the wire. The inner end of the anti-rotation screw 9 exceeds the side wall surface of the pull rod 3 and abuts against the anti-rotation plane 92, which can limit the rotation of the pull rod 3. The anti-rotation screw 9 is provided with a first metal flat washer 10 and a first silicone gasket 11 , and the hollow screw 12 is provided with a second metal flat washer 13 and a second silicone gasket 14 .

[0060] From top to bottom, the piston 6 is divided into three integrally connected upper cylinders 601, circular steps 602 and bottom cylinders 603; the diameter of the circular step 602 is larger than the diameter of the bottom cylinder 603, and the diameter of the bottom cylinder 603 is larger than the diameter of the upper cylinder 601; the upper cylinder is inserted into the frustum structure 502, and a fourth threaded hole 75 is provided at the upper end of the upper cylinder, so that the pull rod 3 can be inserted into the upper cylinder, and a thread 94 is provided at the bottom of the pull rod 3, and the bottom of the pull rod 3 is threadedly connected to the fourth threaded hole 75; a second pin hole 77 is provided on the circular step, and a first pin hole 73 is provided on the lower end face of the frustum structure 502, and the first pin hole 73 and the second pin hole 77 are coaxially matched, and a first cylindrical pin 15 is inserted therein to limit the circumferential relative rotation of the body 5 and the piston 6, and the bottom cylinder 603 is inserted in the connecting flange 7.

[0061] Furthermore, the upper cylinder has two grooves around its circumference, each housing a first O-ring 21 and a second O-ring 22. The first and second O-rings 21 and 22 contact the interior of the body 5, and the resulting deformation after compression prevents oil leakage during loading or unloading. The circular step circumferentially contacts the support structure 503 and also has a groove around its circumference for housing a third O-ring 23.

[0062] The main function of the connecting flange 7 is to connect the entire fixture to the machine tool. The connecting flange 7 comprises an integral connecting portion 701 and a base 702. The base 702 is integrally formed, with the connecting portion 701 protruding from the middle. The upper end of the connecting portion 701 is inserted into the support structure 503. The upper end surface of the connecting portion 701 defines a circular groove 703, into which the bottom cylindrical portion 603 of the piston 6 is inserted.

[0063] Furthermore, a fourth O-ring 24 is disposed between the outer wall of the connecting portion 701 and the support structure 503, and a fifth O-ring 25 is disposed between the outer wall of the bottom cylinder 603 and the inner wall of the circular groove 703. A third through hole 87 is defined in the bottom center of the circular groove 703, and a fifth threaded hole 78 is defined in the center of the piston 6. The third through hole 87 and the fifth threaded hole 78 are coaxial and can be connected via screws.

[0064] There are gaps between the upper surface 79 of the circular step 609 and the bottom of the truncated cone structure 502, and between the lower surface 80 of the circular step 609 and the upper end of the connecting portion 701. These gaps serve as oil storage spaces. Oil flowing through the second oil delivery hole 84 pulls the tie rod 3 downward, indicating normal operation. Oil flowing through the oil delivery line 83 pushes the tie rod 3 upward, returning it to its resting position.

[0065] See also Figure 3 , an oil delivery pipe 83 and a second oil delivery hole 84 are respectively provided in the connecting flange 7, and the oil delivery pipe 83 passes through the connecting part 701 and the base 702, with one end connected to the outside and the other end connected to the oil storage space between the lower surface of the circular step 609 and the connecting part 701; a first oil delivery hole 68 is opened in the supporting structure 503, one end of the first oil delivery hole 68 is connected to the oil storage space between the upper surface 79 and the frustum structure 502, and the other end is connected to the second oil delivery hole 84, one end of the second oil delivery hole 84 is connected to the first oil delivery hole 68, and the other end is connected to the outside; a sink groove is opened on the base 702 at the connection point of the first oil delivery hole 68 and the second oil delivery hole 84, and a sixth O-ring 26 is placed in the sink groove. After the fixture is assembled, the bottom of the supporting part 503 and the base 702 are pressed tightly to prevent oil leakage.

[0066] The support structure 503 is circumferentially defined with three jackscrew holes 70 and a plurality of first through-holes 69. Jackscrews 20 can be inserted into the jackscrew holes 70 and screwed into seventh threaded holes 82 defined in the base 702. The base 702 also has a plurality of sixth threaded holes 81 corresponding to the first through-holes 69. First fixing screws 19 are inserted into the first through-holes 69 and the first threaded holes 81, connecting the body 5 and the connecting flange 7. The support structure 503 and the connecting flange 7 are also positioned by a second cylindrical pin 16. Specifically, corresponding pin holes 85 are defined in the base 702. The cylindrical pin 16 can pass through the lower surface of the support structure 503 and the upper surface of the base 702. A third threaded hole 74 is defined in the sidewall of the support structure 503. The third threaded hole 74 extends through the support structure 503. When the set screw 18 is inserted into the third threaded hole 74, its inner end abuts against the sidewall of the connecting portion 701, preventing relative rotation between the connecting flange and the body and fixing their relative position.

[0067] See also Figure 5 The annular shell 30 is a thin-walled ring-shaped structure, mounted on the support structure 503. A first gasket 31 is disposed between the annular shell 30 and the support structure 503. Threaded holes 99 are provided around the circumference for connecting the annular cover 32. A data processing circuit 34 is disposed in the annular shell 30 and connected to the annular shell 30 via a second screw 54. A camera 48 and a sensor signal transfer circuit 51 are also installed in the annular shell 30. The sensor signal transfer circuit 51 is mounted in the annular shell 30 via a first screw 53. The sensor signal transfer circuit 51 and the data processing circuit 34 are electrically connected. A wire hole 101 is provided on the inner ring of the annular shell 30. An external hexagonal hollow bolt 35 is inserted into the wire hole 101. A wire passes through the external hexagonal hollow bolt 35. A third metal flat washer 36, a third silicone gasket 37, and a seventh O-ring 38 are disposed on the hollow bolt 35. After being inserted into the annular housing 30, the hexagonal hollow bolt 35 is connected via a fourth silicone gasket 39, a fourth metal flat gasket 40, and a thin nut 41. A battery slot 100 is provided in the annular housing 30 for accommodating the lithium battery 45. The annular housing 30 also includes a battery transfer circuit 50 and a switch signal transfer circuit 52. The switch signal transfer circuit 52 is used to connect the switch and the data processing circuit 34. A fourth through hole 98 is provided at the bottom of the annular housing 30. A second fixing screw 46 is inserted into the fourth through hole 98. A fifth metal flat gasket 47 is mounted on the second fixing screw 46. A boss 97 is also provided in the annular housing 30 for securing the data processing circuit 34. One end of the data processing circuit 34 is electrically connected to the switch signal transfer circuit 52, the battery transfer circuit 50, and the sensor signal transfer circuit 51. The other end is connected to the numerical control system via wireless signals to process all data and transmit the data wirelessly.

[0068] The annular housing 30 is provided with an annular cover 32, which has a camera hole 103 formed therein. The camera hole 103 mates with the camera 48 and is covered with a protective glass 49. The annular cover 32 also has a switch hole 102 formed therein, into which a waterproof self-locking switch 42 is inserted. The bottom of the waterproof self-locking switch 42 engages with a nut 44. A third screw 55 is provided on the annular cover 32, which is fitted with a sixth flat metal washer 56 and a fifth silicone washer 57. The third screw 55 is inserted into a fifth through-hole 104 formed in the annular cover 32 and screwed into the threaded hole 99, securing the annular housing 30 and the annular cover 32. A second gasket 33 is provided between the annular housing 30 and the annular cover 32 to prevent liquid from entering the annular housing 30 through the gap between them and damaging the circuitry. The camera protective glass 49 is made of tempered glass, and the contact surface between it and the annular cover 32 is coated with glue.

[0069] The functions of the components of the above structure are as follows:

[0070] (1) Calibration part 1: As a clamping element that is in direct contact with the workpiece, the cylindrical clamping surface 96 can make the clamping force on the workpiece more uniform.

[0071] (2) Bonding expansion sleeve 2: When subjected to the tension of the pull rod, it expands radially away from the center of the circle. On the one hand, it converts the axial tension into radial tension, and on the other hand, it provides the main power to generate clamping force for the calibration part.

[0072] (3) Pull rod 3: As a sensitive element for in-situ detection of tension and vibration, its detection results will be processed as direct data.

[0073] (4) Support member 4: limits the axial freedom of the calibration member 1 and plays a supporting role for the calibration member 1.

[0074] (5) Body 5: As the main component of the intelligent fixture, it plays a bearing and supporting role. All the components of the fixture are installed on it to form a whole. On the other hand, it plays a protective role for the sensor and circuit, protecting them from the corrosion of cutting fluid, rust-proof fluid, etc. during the processing process. The wedge structure 62 on it can convert the axial tension of the pull rod into radial force.

[0075] (6) Piston 6: Through the screwing of the fourth threaded hole 75 and the thread 94, the piston provides axial tension to the pull rod under the pressure of the hydraulic oil on the upper surface 79.

[0076] (7) Connecting flange 7: The connecting flange and the body can be fixed by connecting screws 17. The cavity formed inside can provide a closed environment for the piston. The connecting flange 7 can be fixed to the machine tool by the first fixing screws 19, and finally the intelligent fixture can be fixed to the machine tool.

[0077] (8) Support fixing screw 8: It is an independent part, with a total of 4, which fixes the support 4 to the body.

[0078] (9) Anti-rotation screw 9: It contacts the anti-rotation plane 92 and prevents the pull rod 3 from rotating. When used in combination with the metal gasket 10 and the silicone gasket 11, it can prevent liquid or chips from entering the body through the anti-rotation threaded hole 63 and causing damage to the sensor.

[0079] (10) Hollow screw 12: The wire connecting the sensor passes through the inside of the hollow screw 12 and is used in combination with the second metal gasket 13 and the second silicone gasket 14 to prevent liquid or chips from entering the body through the wire thread hole 65 and causing damage to the sensor. The gap in the wire thread hole 65 is coated with waterproof silicone for secondary protection.

[0080] (11) First cylindrical pin 15: used to limit the relative rotation of the piston 6 relative to the body 5.

[0081] (12) Second cylindrical pin 16: used to locate the assembly position of the connecting flange 7 and the body 5.

[0082] (13) Set screw 18: It is an independent part, with a total of 6, evenly distributed along the circumference, used to fix the relative position of the connecting flange and the body.

[0083] (14) Fixture top screw 20: It is an independent part, with a total of 3, evenly distributed along the circumference, making it easy to remove the intelligent fixture from the machine tool.

[0084] (15) The first O-ring 21 to the sixth O-ring 26 are respectively located in the corresponding grooves. The deformation generated after compression can prevent oil leakage during loading or unloading.

[0085] (16) Force-sensitive chip 27: used to convert the pulling force of the pull rod into a corresponding electrical signal.

[0086] (17) Three-axis vibration sensor 28: used to convert the vibrations of the pull rod in three orthogonal directions into corresponding electrical signals.

[0087] (18) Wire adapter plate 29: used to connect the leads on the sensor with external wires.

[0088] (19) Annular housing 30: Together with the first gasket 31, the annular cover 32, and the gasket 33, it protects the wireless transmission component within its interior. On the one hand, it secures the wireless transmission component to the intelligent fixture, allowing it to rotate with the intelligent fixture; on the other hand, it effectively prevents damage from liquids such as rust preventative fluids and cutting fluids, or from cutting during processing. The first gasket 31 and the second gasket 33 have self-adhesive backings and are attached to the annular housing 30 and the annular cover 32, respectively.

[0089] (20) Data processing circuit 34: processes the QR code information and sensor signals, converts them into digital signals, and finally sends data and instructions to the CNC system.

[0090] (21) External hexagonal hollow bolt 35: The wire passes through its interior, and the gap is filled with insulating silicone. Working together with the third metal flat washer 36, the third silicone washer 37, the seventh O-ring 38, the fourth silicone washer 39, the fourth metal flat washer 40 and the thin nut 41, the wire can be introduced into the interior of the wireless housing and play a good waterproof role.

[0091] (22) Waterproof self-locking switch 42: This is an independent part that serves to open and close the entire wireless transmission assembly. It is used together with the switch metal flat washer 43 and nut 44 to secure the waterproof self-locking switch 42 to the annular cover 32.

[0092] (23) Lithium battery 45: Provides energy for wireless transmission components.

[0093] (24) A second fixing screw 46 and a fifth metal flat washer 47 are used to fix the annular shell 30 to the body.

[0094] (25) Camera 48: used to identify the QR code on the surface of the processed part.

[0095] (26) Protective glass 49: It is a circular glass with good light transmittance. The good light transmittance makes it easy for the camera 48 to quickly identify the QR code. It is glued to the ring cover 32 with glue and can also prevent liquid from entering the interior of the wireless housing through the camera hole 103.

[0096] (27) Battery transfer circuit 50, sensor signal transfer circuit 51, switch signal transfer circuit 52: as transfer stations connecting corresponding components with data processing circuit 34, they can effectively prevent physical damage to data processing circuit 34 during multiple disassembly and assembly processes.

[0097] (28) The first screw 53 and the second screw 54 are independent parts used to fix the electronic components inside the annular housing 30.

[0098] (29) The third screw 55, the sixth metal flat gasket 56, and the fifth silicone gasket 57 are used to fix the annular cover 32 to the annular shell 30 and to press the second gasket 33 to prevent the liquid from flowing into the gap between the annular shell 30 and the second gasket 33 during processing.

[0099] The working process of the present invention is as follows:

[0100] First, the workpiece should be pre-processed with a hole structure that can fit with the clamping surface 96 of the calibration component 1.

[0101] During actual operation, the intelligent fixture is first mounted on the machine tool using the first fixing screw 19. The automated robotic arm then places the part being processed onto the clamping surface 96 of the calibration component 1. At this point, the part is not stably clamped. The camera 48 in the wireless transmission assembly then scans and identifies a QR code printed or affixed to the surface of the part being processed. The collected data is then wirelessly transmitted to the CNC system via the data processing circuit 34. By accessing the data on the central server, all data related to the part's lifecycle can be obtained. Ultimately, the CNC panel displays information including, but not limited to, the part's number, machining drawings, dimensional parameters, process flow, number of parts, desired clamping force, the part's machining process, and the CNC codes already performed and those to be performed. Scanning the QR code using the camera 48 also records the machining process and related information performed on the machine tool for the scanned part and uploads it to the central server. This ensures a digital record of the entire part machining lifecycle, ensuring traceability at every stage of the machining process.

[0102] When the CNC machine tool begins operation, the CNC system controls the machine's hydraulic system to pressurize hydraulic oil into the body 5 through the second oil delivery hole 84 of the connecting flange 7 and the first oil delivery hole 68 within the body 5. The hydraulic oil entering the body 5 contacts the upper surface 79 of the piston 6, exerting axial pressure on the upper surface 79. Through the threaded connection between the fourth threaded hole 75 of the piston 6 and the thread 94 of the tie rod 3, the tie rod 3 is subjected to axial tension. The adhesive expansion sleeve 2, located below the annular end surface 91 of the tie rod 3, is subjected to axial pressure. Due to the presence of the wedge surface 88, the wedge structure 88 of the body 5 exerts tangential friction and normal support forces on the adhesive expansion sleeve 2. This forces the adhesive expansion sleeve 2 to expand radially outward. Based on the principle of equilibrium, the calibration piece 1, which is positioned around the adhesive expansion sleeve 2, generates a radial tension between the adhesive expansion sleeve 2 and the calibration piece 1, maintaining equilibrium.

[0103] According to the principle of interactive force, the tensioning contact surface 95 of the calibration part 1 will be subjected to the tensioning force reaction force radially away from the center of the circle. Under the action of this force, the calibration part 1 as a whole will produce a small deformation radially away from the center of the circle, and finally achieve the clamping of the processed part through the small deformation of the clamping surface 96.

[0104] During the continuous clamping process of the processed parts, the tension on the pull rod 3 continues to increase, and the force-sensitive chip 27 encapsulated on the stress plane 93 continuously detects the tension changes of the pull rod 3. The data processing circuit 34 converts the collected tension information into an electrical signal according to the corresponding functional relationship into a clamping force, and transmits it to the machine tool CNC system. The machine tool CNC system processes the relationship between the measured clamping force and the preset clamping force, and through feedback control, increases the oil pressure when the measured clamping force is insufficient, and reduces the oil pressure when the measured clamping force is too large, so that the measured clamping force finally reaches the expected value.

[0105] Throughout the machining process, the triaxial vibration sensor 28, encapsulated on the stress plane 93, operates continuously, detecting the vibration signal, centrifugal acceleration, and dynamic balance status of the intelligent fixture in real time. The data processing circuit 34 processes the collected vibration and centrifugal acceleration signals, determines whether the current machining parameters are appropriate based on the vibration signals, and calculates the current fixture speed based on the centrifugal acceleration. This information is wirelessly transmitted to the CNC system, which uses negative feedback to adjust the current machining parameters so that the speed of the machined part reaches the predetermined value. Furthermore, to prevent possible tool collisions, tool wear, and other faults during machining, the system detects in real time whether there are abnormal spikes or fluctuations. If any abnormal signal is detected, an alarm is issued, and the abnormal signal is transmitted to the CNC system, along with a shutdown command, to ensure safe and stable machining operations.

[0106] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0107] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0108] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0109] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0110] While 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 invention, and that the scope of the invention is defined by the claims and their equivalents.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent fixture for an intelligent manufacturing production line, characterized in that: It comprises a body (5), the lower end of the body (5) being connected to a connecting flange (7); The body (5) comprises a wedge-shaped structure (62), a truncated cone structure (502), and a support structure (503) integrally connected from top to bottom, wherein the lower end of the support structure (503) is connected to a connecting flange (7); an adhesive expansion sleeve (2) is provided outside the wedge-shaped structure (62), and a calibration piece (1) is provided outside the adhesive expansion sleeve (2); The wedge-shaped structure (62) and the truncated cone structure (502) are both inserted into a pull rod (3), the upper end of the pull rod (3) is an annular end surface (91), and the annular end surface (91) is in contact with the upper end plane of the bonding expansion sleeve (2); a force-sensitive chip (27) and a three-axis vibration sensor (28) are installed on the side wall of the pull rod (3); the lower end of the pull rod (3) is connected to a piston (6), and the piston (6) is set in the body (5) and the connecting flange (7); An annular shell (30) is provided on the support structure (503), and a switch signal transfer circuit (52), a sensor signal transfer circuit (51) and a data processing circuit (34) are provided in the annular shell (30), and the data processing circuit (34) is wirelessly connected to a numerical control system, the sensor signal transfer circuit (51) is connected to the force-sensitive chip (27) and the three-axis vibration sensor (28) via electrical signals, and the sensor signal transfer circuit (51) is connected to the data processing circuit (34) via electrical signals; the switch signal transfer circuit (52) is connected to the data processing circuit (34) via electrical signals; and an annular cover (32) is provided at the upper end of the annular shell (30); A gap for storing oil is provided between the piston (6) and the frustum structure (502), and between the piston (6) and the connecting flange (7); The connecting flange (7) is provided with a second oil delivery hole (84) and an oil delivery pipeline (83), and the supporting structure (503) is provided with a first oil delivery hole (68), the first oil delivery hole (68) and the second oil delivery hole (84) are connected; one end of the oil delivery pipeline (83) is connected to the gap between the piston (6) and the connecting flange (7), and the second oil delivery hole 84 and the first oil delivery hole (68) are connected to the gap between the piston (6) and the frustum structure (502).

2. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: A stress plane (93) and an anti-rotation plane (92) are provided on the side wall of the pull rod (3); the force-sensitive chip (27) and the three-axis vibration sensor (28) are mounted on the stress plane (93); a hollow screw (12) is inserted into the truncated cone structure (502), a wire is inserted into the hollow screw (12), and the wire is connected to the three-axis vibration sensor (28) and the force-sensitive chip (27) through a wire adapter plate (92); the wire is connected to the sensor signal adapter circuit (51); An anti-rotation screw (9) is inserted into the truncated cone structure (502), and the inner end of the anti-rotation screw (9) abuts against the anti-rotation plane (92).

3. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: The bonding expansion sleeve (2) is an annular structure, the inner ring is a wedge surface (88), and the outer ring is a cylindrical tightening surface (89); the calibration piece (1) is a thick-walled cylindrical structure, the inner ring is a tightening contact surface (95), and the outer ring is a clamping surface (96); The wedge surface (88) contacts the wedge structure (62), and the cylindrical tensioning surface (89) contacts the tensioning contact surface (95); When the fixture clamps the workpiece, the workpiece is sleeved outside the clamping surface (96).

4. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: A transition structure (501) is integrally connected between the wedge-shaped structure (62) and the truncated cone structure (502). A support member (4) is sheathed on the transition structure (501), and the support member (4) is in contact with the lower portion of the calibration member (1).

5. The intelligent fixture for an intelligent manufacturing production line according to claim 4, characterized in that: A circular countersunk hole (58) is provided in the inner ring of the support member (4), and a supporting plane (61) is provided on the upper surface of the support member (1) around a circumferential array.

6. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: The piston (6) comprises an upper cylinder (601), a circular step (602), and a bottom cylinder (603) integrally connected from top to bottom; The connecting flange (7) comprises a base (702), and a connecting portion (701) protruding upward is provided at the center of the base (702); The upper cylinder (601) is inserted into the truncated cone structure (502), the pull rod (3) is inserted into the upper cylinder (601), and the pull rod (3) and the upper cylinder (601) are detachably connected; the circular step (602) is arranged in the supporting structure (503); The connecting portion (701) is embedded in the supporting structure (503), and the connecting portion (701) is below the circular step (602); a circular groove (703) is provided on the connecting portion (701), and the bottom cylinder (603) is inserted into the circular groove (703); The piston (6) and the connecting flange (7) are detachably connected.

7. The intelligent fixture for an intelligent manufacturing production line according to claim 6, characterized in that: Sealing rings are provided between the upper cylinder (601) and the truncated cone structure (502), between the circular step (602) and the supporting structure (503), between the connecting portion (701) and the supporting structure (503), and between the bottom cylinder (603) and the inner wall of the cylindrical groove (703).

8. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: A camera (48) and a lithium battery (45) are installed in the annular shell (30), a camera hole (103) is opened on the annular cover (32), and a protective glass (49) is provided on the camera hole (103).

9. The intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: The connecting flange (7) is provided with a connecting hole and a connecting piece for connecting with the supporting structure (503), and the connecting flange (7) is provided with a connecting hole and a connecting piece for connecting with a machine tool.

10. A clamping method for an intelligent fixture for an intelligent manufacturing production line according to claim 1, characterized in that: The following steps are involved: S1, install the entire fixture on the machine tool through the connecting flange (7); S2, placing the processed part on the calibration part (1); S3, hydraulic oil is pressed into the interior of the body (5) through the second oil delivery hole (84) and the first oil delivery hole (68), the hydraulic oil presses the piston (6) downward, and the piston (6) drives the pull rod (3) to move downward; the pull rod (3) applies pressure to the bonding expansion sleeve (2) through the annular end surface (91), and the bonding expansion sleeve (2) expands under the action of the wedge structure (62), and the calibration piece (1) is deformed radially under the action of the bonding expansion sleeve (2) to clamp the processed part; S4, when the workpiece is being clamped, the tension on the pull rod (3) increases, the force-sensitive chip (27) detects the change in the tension of the pull rod (3), and transmits the tension information to the numerical control system through the sensor signal transfer circuit (51) and the data processing circuit (34). When the clamping force is insufficient, the numerical control system increases the oil pressure input to the second oil delivery hole (84) by controlling the hydraulic system of the machine tool. When the clamping force is too large, the oil pressure input to the second oil delivery hole (84) is reduced so that the oil pressure reaches the desired value; During the machining process, the three-axis vibration sensor (28) detects the vibration signal, centrifugal acceleration and dynamic balance state of the intelligent fixture in real time, and transmits the vibration signal, centrifugal acceleration and dynamic balance state information to the numerical control system through the data processing circuit (34). The numerical control system corrects the machining parameters according to the information so that the rotation speed of the machined part reaches a predetermined value; During the machining process, the three-axis vibration sensor (28) also detects abnormal peak signals and abnormal fluctuation signals. If an abnormal peak signal or abnormal fluctuation signal occurs, an alarm is issued and the signal is transmitted to the numerical control system, and the numerical control system is shut down.

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