Intelligent clamp for intelligent manufacturing production line and clamping method

Abstract

The invention discloses an intelligent clamp for an intelligent manufacturing production line and a clamping method, and belongs to the technical field of clamps. According to the method, a body is of a cone frustum structure, the lower end of the cone frustum structure is connected with a connecting flange, and an annular shell is arranged on the periphery of the cone frustum structure; the circular truncated cone structure is provided with a bonding expansion sleeve for clamping a workpiece and a calibration piece, a pull rod and a piston for implementing measurement are arranged in the circular truncated cone structure, various circuits and related parts are arranged in the annular shell, and the flange is used for being connected with a machine tool. The clamp can achieve the purpose of accurately monitoring the machining state and the part clamping force in the precise machining process in real time.

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 parts. Precision machining technology puts forward higher requirements on the performance of the fixture. Traditional fixture clamping relies more on the skills and experience of operators, and the subjective consciousness of operators is more obvious, which greatly limits the processing accuracy of parts, resulting in bottlenecks in the accuracy consistency, processing efficiency and yield improvement under batch manufacturing. With the continuous development of new sensing technologies, signal recognition and processing algorithms, by integrating sensors and setting actuators inside the fixture to form a closed-loop control system, it becomes possible for intelligent fixtures to execute autonomously or interact with machine tools. Intelligent fixtures are widely used in the fields of automobiles, ships, aerospace, machining, etc., such as the processing of composite materials, high-performance bearings, and automobile engines in the aerospace field. Among them, part clamping force detection and machining vibration state detection are two crucial aspects of the intelligent process. Reasonable clamping force can prevent parts from moving, falling off or deforming during processing, ensuring processing accuracy; vibration during processing will cause cutting force fluctuations, increased cutting temperature and other problems, which will affect the processing quality. Long-term vibration will also increase the wear of fixtures, tools and machine tool parts, and reduce the service life of equipment. Therefore, it is very important to accurately monitor the clamping force and machining vibration state of parts.

[0003] Domestic research on clamping force is mainly conducted from the aspects of clamping force error compensation, fixture element 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 element position layout optimization method, which 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." designed a chuck wireless force measuring device based on an S-type pressure sensor, but it did not integrate the sensor into the fixture, and could not feed back the signal 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 the machining process, machining vibration problems often occur due to the influence of multiple factors such as machine tools, tools, workpieces, and cutting forces. Current research does not take into account the vibration of the fixture and parts when the fixture clamps the parts, and does not consider the multi-scale characteristics of the wear of tools, fixtures, etc. in different signal dimensions. It is impossible to effectively mine the multi-sensor fusion features, resulting in incomplete data collected by the sensors and insufficient fusion. Summary of the invention

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

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An intelligent fixture for an intelligent manufacturing production line comprises a body, the lower end of which is connected with a connecting flange; The body comprises a wedge-shaped structure, a truncated cone structure and a supporting structure which are integrally connected from top to bottom, and the lower end of the supporting structure is connected to a connecting flange; a bonding expansion sleeve is arranged outside the wedge-shaped structure, and a calibration piece is arranged outside the bonding expansion sleeve; 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, and the annular end face is in contact with the upper end plane of the bonding expansion sleeve; a force-sensitive chip and a three-axis vibration sensor are installed on the side wall of the pull rod; a piston is connected to the lower end of the pull rod, and the piston is arranged in the body and the connecting flange; An annular shell is provided on the support structure, and a switch signal switching circuit, a sensor signal switching 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 switching circuit is connected to a force-sensitive chip and a three-axis vibration sensor through electrical signals, and the sensor signal switching circuit is connected to the data processing circuit through electrical signals; the switch signal switching circuit is connected to the data processing circuit through electrical signals; an annular cover is provided at the upper end of the annular shell; A gap for storing oil is provided between the piston and the truncated cone structure, and between the piston and the connecting flange; 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.

[0007] A further improvement of the present invention is: 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 three-axis vibration sensor are installed on the stress plane; a hollow screw is inserted into the truncated cone structure, a wire is inserted into the hollow screw, and the wire is connected to the three-axis vibration sensor and the force-sensitive chip through a wire adapter plate; the wire is connected to the sensor signal adapter circuit; 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; Preferably, the bonding expansion sleeve is an annular structure, the inner ring is a wedge-shaped surface, and the outer ring is a cylindrical tightening surface; the calibration piece is a thick-walled cylindrical structure, the inner ring is a tightening contact surface, and the outer ring is a clamping surface; The wedge-shaped surface is in contact with the wedge-shaped structure, and the cylindrical tensioning surface is in contact with the tensioning contact surface; When the fixture clamps the workpiece, the workpiece is mounted outside the clamping surface.

[0008] 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.

[0009] Preferably, a circular countersunk hole is opened in the inner ring of the support member, and the upper surface of the support member has a supporting plane around the circumferential array.

[0010] Preferably, the piston comprises an upper cylinder, a circular step and a bottom cylinder integrally connected from top to bottom; The connecting flange comprises a base, and a connecting portion protruding upward is provided at the center of the base; 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; The connecting part is embedded in the supporting structure, and the connecting part is below the circular step; a circular groove is opened on the connecting part, and the bottom cylinder is inserted into the circular groove; The piston and the connecting flange are detachably connected.

[0011] 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.

[0012] 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 arranged on the camera hole.

[0013] Preferably, the connecting flange is provided with connecting holes and connecting pieces for connecting with the supporting structure, and the connecting flange is provided with connecting holes and connecting pieces for connecting with the machine tool.

[0014] A clamping method for an intelligent fixture for the intelligent manufacturing production line, comprising the following steps: S1, install the entire fixture on the machine tool through the connecting flange; S2, placing the processed part on the calibration part; 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 to move downward; the pull rod applies pressure to the bonding expansion sleeve through the annular end surface, the bonding expansion sleeve expands under the action of the wedge structure, and the calibration piece is deformed radially under the action of the bonding expansion sleeve to clamp the processed part; S4, when the workpiece is being clamped, the tension on the pull rod increases, 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 transfer 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 so that the oil pressure reaches the expected value; During the processing, the three-axis vibration sensor 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 CNC system through the data processing circuit. The CNC system corrects the processing parameters according to the information so that the speed of the processed part reaches the predetermined value; 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an intelligent fixture for an intelligent manufacturing production line to solve the problem of accurately and in real time monitoring the machining state and the clamping force of parts during precision machining. In view of the need for accurately monitoring the machining vibration state and the clamping force of parts during machining, the fixture of the present invention has the following advantages: (A) The wedge-shaped surface fit and the cylindrical clamping method of the calibration piece provide an efficient, accurate and reliable clamping solution for the machining process. This clamping structure not only realizes the precise control of the clamping force through the functional relationship between the axial tension and the radial clamping force, but also ensures the uniform distribution of the clamping force, thereby significantly improving the deformation problem that may occur in the clamping process of the machined parts. The uniformly distributed clamping force also helps to reduce the wear and stress concentration of the fixture itself, and prolong the service life of the fixture.

[0016] (B) By integrating the force-sensitive chip and the three-axis vibration sensor into the fixture, the clamping force and vibration can be measured synchronously, improving the compactness and installation convenience of the fixture as a whole. ① The sensor signal collected can directly reflect the clamping force information, vibration conditions and centrifugal acceleration of the fixture rotation during processing. The real-time and accurate measurement of the clamping force can enable the CNC system to adjust the clamping force to the appropriate range. Through the centrifugal acceleration and vibration signals, the information such as the rotation speed and abnormal vibration of the parts can be sensed with high precision, and the operation stability of the intelligent fixture and the processed parts can be monitored. ② By monitoring the force and vibration conditions of the pull rod in real time, the system can promptly detect potential safety hazards and prevent the occurrence of damaging accidents such as collisions and fractures, playing a role similar to that of automobile airbags. ③ The vibration signals and centrifugal acceleration signals collected by the three-axis vibration sensor can be used to judge the dynamic balance state of the part itself during the processing process, and the dynamic imbalance state can be fed back to the CNC system in a timely manner, and the processing parameters can be adjusted to ensure the stability of the part operation and the accuracy of the processing. 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 scrapping of fixtures or processing accidents caused by fixture fatigue failure. It can also increase the service life of fixtures, reduce processing costs during the processing process, and reduce the time required to replace fixtures.

[0017] (C) The use of QR code recognition technology on the processed parts can quickly and accurately record and track the information of the entire process of part processing, such as part number, size parameters, technical requirements, processing status, completed process steps, ongoing processes, and pending processing processes. The CNC system can automatically call out the CNC code to be processed, which helps to realize the automation and intelligence of the processing process and improve production efficiency. By tracking the part processing process, it is also possible to adjust the production plan in a timely manner, monitor the production status of parts in real time, discover and solve problems in a timely manner, and improve the processing quality of parts.

[0018] (D) Through wireless transmission technology between circuits, the intelligent fixture can achieve seamless connection with the machine tool control system, making the entire processing process more automated and intelligent. Wireless transmission is different from wired forms. It 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, and it can rotate as a whole with the machine tool spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the intelligent fixture; Figure 2 This is the positive axial sectional view of the intelligent fixture; Figure 3 It is the lateral axial section view of the intelligent fixture; Figure 4 It is a schematic diagram of the structure of the support and calibration parts; Figure 5 This is a schematic diagram of the internal structure of the wireless transmission component housing; Figure 6 This is a schematic diagram of the structure of the wireless transmission component cover.

[0020] 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 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 third The second oil delivery hole; 85, the third pin hole; 86, the countersunk groove; 87, the third through hole; 88, the wedge surface; 89, the cylindrical tightening surface; 90, the hexagonal groove; 91, the annular end face; 92, the anti-rotation plane; 93, the stress plane; 94, the thread; 95, the tightening contact surface; 96, the clamping surface; 97, the boss; 98, the fourth through hole; 99, the eighth threaded hole; 100, the battery slot; 101, the wire hole; 102, the switch hole; 103, the camera hole; 104, the fifth through hole; 501, the transition structure; 502, the truncated cone structure; 503, the supporting structure; 601, the upper cylinder; 602, the circular step; 603, the bottom cylinder; 701, the connecting part; 702, the base; 703, the circular groove. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings: Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] An intelligent clamp designed by the present invention mainly includes a clamp body, a sensor component and a wireless transmission component.

[0023] 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 part 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 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. The piston 6 is a rotating body structure, mainly including the fourth threaded hole 75, the annular groove 76, the second pin hole 77, the fifth threaded hole 78, the upper surface 79, the lower surface 80 and other structures. The connecting flange 7 is a rotating body part, mainly including the sixth threaded hole 81, the seventh threaded hole 82, the oil pipeline 83, the second oil hole 84, the third pin hole 85, the sink 86, and the third through hole 87; the support fixing screw 8, the first cylindrical pin 15, the second cylindrical pin 16, the connecting screw 17, the set screw 18, the first fixing screw 19, the clamp top screw 20 and the O-rings 21-26 are all independent parts.

[0024] The sensor assembly includes: a calibration part 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 three-axis vibration sensor 28, and a wire adapter plate 29. The pull rod 3 is a tension component, on which there are a hexagonal groove 90, an annular end face 91, an anti-rotation plane 92, a stress plane 93, and a thread 94; the anti-rotation screw 9, the first metal flat washer 10, the first silicone washer 11, the hollow screw 12, the second metal flat washer 13, and the second silicone washer 14 are independent parts; the force-sensitive chip 27, the three-axis vibration sensor 28, and the wire adapter plate 29 need to be glued and fixed on the stress plane 93.

[0025] 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 hexagon 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.

[0026] The body 5 includes a wedge structure 62, a transition structure 501, a truncated cone structure 502 and a support structure 503 which are connected in sequence from top to bottom. The truncated cone structure 502 is a truncated cone, similar to a "trumpet", the wedge structure 88 is a truncated cone structure, the transition structure 501 and the support structure 503 are both cylindrical structures, and the diameters of the lower end faces of the wedge structure 88 and the truncated cone structure 502 are both larger than the upper end faces; the bonding expansion sleeve 2 is fixedly sleeved on the outside of the wedge structure 88, the calibration piece 1 is detachably sleeved on the outside of the bonding expansion sleeve 2, the support piece 4 is fixedly sleeved on the outside of the transition structure 501, the bottom of the calibration piece 1 is in contact with the support piece 4, and the support piece 4 is fixedly connected to the body 5 through the support piece fixing screws 8. The lower end of the support structure 503 is connected to the connecting flange 7.

[0027] For further information, see Figure 2 The right detailed view shows that the inner surface of the adhesive expansion sleeve 2 is a wedge-shaped surface 88 that closely matches 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 matches 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 a tensioning contact surface 95, and the outer ring is a clamping surface 96.

[0028] See also Figure 4The support member 4 is an annular structure as a whole, which is mounted on the outside of the transition structure 501. The inner ring of the support member 4 is provided with a circular countersunk hole 58 around its circumference, so that the inside of the support member 4 is stepped; the support member 4 is provided with four countersunk holes 59 around its circumference for installing fixing screws 8, which connect the support member 4 and the frustum 502; the upper end surface of the support member 4 is arranged around its circumference, and there is an array of protruding support planes 61. By setting an array structure support plane, the size of the plane can be appropriately reduced while satisfying the most basic support function, so as to avoid excessive constraints as much as possible, and the processing accuracy of the entire plane can be appropriately reduced. When the calibration member 1 is mounted on the outside of the bonding expansion sleeve 2, the bottom can be supported by the support plane 61. When the bonding expansion sleeve 2 is forced to move downward, the setting of the circular countersunk hole 58 can provide a certain space for it. See also Figure 2 and Figure 3 The lower end of the truncated cone structure 502 is integrally connected to the support structure 503, and a stepped through hole is provided inside along the axial direction for placing the pull rod 3 and the piston 6; the upper end of the truncated cone structure 502 is provided with a first threaded hole 63, and the first threaded hole 63 is used to connect with the support member fixing screw 8, so as to fix the support member 4 to the main body 5; the side wall of the truncated cone structure 502 is provided with an inclined hole 67 to facilitate the disassembly of the clamp, and is also provided with an anti-rotation threaded hole 64 and a wire threaded hole 65 perpendicular to the axial direction.

[0029] See also 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 and the upper end of the bonding expansion sleeve 2 are tightly matched to maintain the axial balance of the bonding expansion sleeve 2; the side wall of the middle part of the pull rod 3 is provided with an anti-rotation plane 92 and a stress plane 93, and 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, the force-sensitive chip 27 and the three-axis sensor 28 are both provided with lead welding points, and the lead welding points 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, and the hollow screw 12 is used to insert the wire, and the wire is electrically connected to the wire adapter plate 29. The other end of the wire is connected to the sensor signal transfer circuit 51 in the annular shell 30, and the middle part is stuck in the wire groove 66, which forms a fixing effect on 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 washer 11 , and the hollow screw 12 is provided with a second metal flat washer 13 and a second silicone washer 14 .

[0030] The piston 6 is divided into three integrally connected parts from top to bottom: an upper cylinder 601, a circular step 602 and a bottom cylinder 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.

[0031] Furthermore, the upper cylinder has two grooves around its circumference, which are used to place the first O-ring 21 and the second O-ring 22 respectively. The first O-ring 21 and the second O-ring 22 are in contact with the inside of the body 5, and the deformation generated after compression can prevent oil leakage during loading or unloading. The circumference of the circular step is in contact with the support structure 503, and a groove is formed around the circular step to place the third O-ring 23.

[0032] The main function of the connecting flange 7 is to connect the entire fixture and the machine tool. The connecting flange 7 includes a connecting portion 701 and a base 702 that are connected in one piece; the base 702 is a base 702 as a whole, and the connecting portion 701 protrudes from the middle part, the upper end of the connecting portion 701 is inserted into the supporting structure 503, and a circular groove 703 is formed on the upper end surface of the connecting portion 701, and the bottom cylinder 603 of the piston 6 is inserted into the circular groove 703.

[0033] Furthermore, a fourth O-ring 24 is provided between the outer wall of the connecting portion 701 and the supporting structure 503, and a fifth O-ring 25 is provided between the outer wall of the bottom cylinder 603 and the inner wall of the circular groove 703. A third through hole 87 is provided at the bottom center of the circular groove 703, and a fifth threaded hole 78 is provided at the center of the piston 6. The third through hole 87 and the fifth threaded hole 78 are coaxial and can be connected by screws.

[0034] There is a gap 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, and the gap is used as an oil storage space. The oil inlet of the second oil delivery hole 84 can pull the tie rod 3 downward, which is a normal working state. The oil inlet of the oil delivery pipeline 83 can push the tie rod 3 upward, so that the tie rod 3 returns to the position when it is not working.

[0035] See also Figure 3 , an oil delivery pipeline 83 and a second oil delivery hole 84 are respectively provided in the connecting flange 7, the oil delivery pipeline 83 runs through the connecting part 701 and the base 702, one end of which is connected to the outside, and the other end of which is 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 provided 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 truncated cone 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 provided 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.

[0036] The support structure 503 is provided with three top screw through holes 70 and a plurality of first through holes 69 around the circumference. The top screw 20 can be inserted into the top screw through hole 70 and screwed into the seventh threaded hole 82 provided in the base 702. The base 702 is also provided with a plurality of sixth threaded holes 81 corresponding to the first through holes 69. The first fixing screw 19 is inserted into the first through holes 69 and the first threaded holes 81 to connect 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, the base 702 is provided with a corresponding pin hole 85. The cylindrical pin 16 can pass through the lower surface of the support structure 503 and the upper surface of the base 702. The side wall of the support structure 503 is provided with a third threaded hole 74. The third threaded hole 74 can penetrate the support structure 503. When the set screw 18 is inserted into the third threaded hole 74, the inner end portion and the side wall of the connecting portion 701 abut against each other to prevent the relative rotation of the connecting flange and the body, and fix the relative position of the two.

[0037] See also Figure 5 The annular shell 30 is an annular thin-walled structure, which is arranged on the support structure 503. A first gasket 31 is arranged between the annular shell 30 and the support structure 503. A threaded hole 99 for connecting the annular cover 32 is arranged around the circumference. A data processing circuit 34 is arranged in the annular shell 30. The data processing circuit 34 is connected to the annular shell 30 through a second screw 54. A camera 48 and a sensor signal switching circuit 51 are also installed in the annular shell 30. The sensor signal switching circuit 51 is installed in the annular shell 30 through a first screw 53. The sensor signal switching circuit 51 and the data processing circuit 34 are connected by electrical signals. A wire hole 101 is arranged on the inner ring of the annular shell 30. An external hexagonal hollow bolt 35 is inserted into the wire hole 101. The wire passes through the external hexagonal hollow bolt 35. A third metal flat gasket 36, a third silicone gasket 37 and a seventh O-ring 38 are arranged on the hollow bolt 35. After the hexagonal hollow bolt 35 is inserted into the annular shell 30, it is connected through the fourth silicone gasket 39, the fourth metal flat gasket 40 and the thin nut 41. A battery slot 100 is provided in the annular shell 30 for placing the lithium battery 45. A battery transfer circuit 50 and a switch signal transfer circuit 52 are also provided in the annular shell 30. 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 shell 30. A second fixing screw 46 is inserted into the fourth through hole 98. A fifth metal flat gasket 47 is sleeved on the second fixing screw 46; a boss 97 is also provided in the annular shell 30 for fixing 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, and the other end is connected to the numerical control system through a wireless signal to process all data and send data wirelessly.

[0038] The annular shell 30 is provided with an annular cover 32, and a camera hole 103 is provided on the annular cover 32. The camera hole 103 matches the camera 48, and a protective glass 49 is provided on the camera hole 103. The annular cover 32 is provided with a switch hole 102, and a waterproof self-locking switch 42 is inserted into the switch hole 102. The bottom of the waterproof self-locking switch 42 matches the nut 44. The annular cover 32 is provided with a third screw 55, and the third screw 55 is provided with a sixth metal flat gasket 56 and a fifth silicone gasket 57. The third screw 55 is inserted into the fifth through hole 104 provided in the annular cover 32 and screwed into the threaded hole 99 to fix the annular shell 30 and the annular cover 32. A second gasket 33 is provided between the annular shell 30 and the annular cover 32 to prevent liquid from entering the annular shell 30 from the gap between the two and causing damage to the circuit. The camera protective glass 49 is tempered glass, and glue is coated between the contact surface between the annular cover 32 and the annular cover 32.

[0039] The functions of the components of the above structure are as follows: (1) Calibration member 1: As a clamping element in direct contact with the workpiece, the cylindrical clamping surface 96 can make the clamping force on the workpiece more uniform.

[0040] (2) Bonding expansion sleeve 2: When subjected to the pulling force of the pull rod, it expands radially away from the center of the circle. On the one hand, it converts the axial pulling force into radial tensioning force, and on the other hand, it provides the main power to generate clamping force for the calibration part.

[0041] (3) Pull rod 3: As a sensitive element for in-situ detection of tension and vibration, its detection conditions will be processed as direct data.

[0042] (4) Support member 4: limits the axial freedom of calibration member 1 and supports calibration member 1.

[0043] (5) Body 5: As the main part of the intelligent fixture, it plays a bearing and supporting role on the one hand. All parts of the fixture are installed on it to form a whole; on the other hand, it plays a role in protecting the sensor and circuit from the corrosion of cutting fluid, rust-proof fluid, etc. during the processing. The wedge-shaped structure 62 on it can convert the axial tension of the pull rod into radial force.

[0044] (6) Piston 6: Through the screwing of the fourth threaded hole 75 and the thread 94, the piston 6 provides an axial pulling force to the pull rod under the pressure of the hydraulic oil on the upper surface 79.

[0045] (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.

[0046] (8) Support member fixing screw 8: It is an independent part, with a total of 4 screws, which fix the support member 4 to the main body.

[0047] (9) Anti-rotation screw 9: It contacts the anti-rotation plane 92 to prevent 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.

[0048] (10) Hollow screw 12: The wire connected to 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.

[0049] (11) First cylindrical pin 15 : used to limit the relative rotation of the piston 6 with respect to the body 5 .

[0050] (12) Second cylindrical pin 16: used to locate the assembly position of the connecting flange 7 and the body 5.

[0051] (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.

[0052] (14) Fixture top screw 20: It is an independent part, with a total of 3 parts, which are evenly distributed along the circumference to facilitate the removal of the smart fixture from the machine tool.

[0053] (15) The first O-ring 21 to the sixth O-ring 26 are respectively located in corresponding grooves. The deformation generated after compression can prevent oil leakage during loading or unloading.

[0054] (16) Force-sensitive chip 27: used to convert the pulling force of the pull rod into a corresponding electrical signal.

[0055] (17) Three-axis vibration sensor 28: used to convert the vibrations of the pull rod in three orthogonal directions into corresponding electrical signals.

[0056] (18) Wire adapter plate 29: used to connect the leads on the sensor with external wires.

[0057] (19) Annular shell 30: Together with the first gasket 31, the annular cover 32 and the gasket 33, the wireless transmission component is protected in its internal space. On the one hand, the wireless transmission component is fixed on the intelligent fixture so that it can rotate with the intelligent fixture; on the other hand, it can effectively prevent the damage to it by liquids such as rust-proof liquid and cutting fluid or cutting during the processing. The first gasket 31 and the second gasket 33 have their own adhesive backing and are respectively adhered to the annular shell 30 and the annular cover 32.

[0058] (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.

[0059] (21) External hexagon hollow bolt 35: The wire passes through its interior and the gap is filled with insulating silicone. Working together with the third metal flat gasket 36, the third silicone gasket 37, the seventh O-ring 38, the fourth silicone gasket 39, the fourth metal flat gasket 40 and the thin nut 41, the wire can be introduced into the interior of the wireless housing and play a good waterproof role.

[0060] (22) Waterproof self-locking switch 42: It is an independent part that serves to open and close the entire wireless transmission component. It can be used together with the switch metal flat gasket 43 and the nut 44 to fix the waterproof self-locking switch 42 to the annular cover 32.

[0061] (23) Lithium battery 45: provides energy for the wireless transmission component.

[0062] (24) A second fixing screw 46 and a fifth metal flat washer 47 are used to fix the annular shell 30 to the body.

[0063] (25) Camera 48: used to identify the QR code on the surface of the processed part.

[0064] (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 it can also prevent liquid from entering the wireless housing through the camera hole 103.

[0065] (27) Battery transfer circuit 50, sensor signal transfer circuit 51, switch signal transfer circuit 52: As transfer stations for 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.

[0066] (28) The first screw 53 and the second screw 54 are independent parts used to fix the electronic components inside the annular housing 30 .

[0067] (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.

[0068] The working process of the present invention is as follows: First, the workpiece should be pre-processed with a hole structure that can match the clamping surface 96 of the calibration piece 1.

[0069] In actual work, the intelligent fixture is first installed on the machine tool through the first fixing screw 19, and then the machined part is placed on the clamping surface 96 of the calibration part 1 through the automated equipment manipulator. At this time, the machined part is in an unstably clamped state. Then, the camera 48 in the wireless transmission component scans and identifies the QR code printed or pasted on the surface of the machined part, and the collected data is wirelessly transmitted to the CNC system through the data processing circuit 34. By accessing the data of the main server, all data of the life cycle of the part can be obtained, and finally, the CNC panel can obtain and display information including but not limited to the number of the machined part, processing drawings, dimensional parameters, process, number of pieces, expected clamping force, processing procedures of the part, and CNC codes that have been and are to be performed. The QR code scanning by the camera 48 will also perform the following operations to record the processing procedures and related information of the scanned part on the machine tool, and upload them to the main server. This makes the entire life cycle of the part processing digitally recorded, and every link of the part processing is traceable.

[0070] When the CNC machine tool starts to work, the CNC system will control the hydraulic system of the machine tool to press the 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 inside the body 5. The hydraulic oil entering the body 5 will contact the upper surface 79 of the piston 6 and exert axial pressure on the upper surface 79. Through the connection between the fourth threaded hole 75 of the piston 6 and the threaded structure of the thread 94 of the tie rod 3, the tie rod 3 will be subjected to axial tension. The bonding sleeve 2 located below the annular end surface 91 of the tie rod 3 will be subjected to axial pressure. At this time, due to the presence of the wedge surface 88, the wedge structure 88 of the body 5 will generate friction and normal support force along the tangential direction of the wedge surface 88 on the bonding sleeve 2, and the bonding sleeve 2 will have a radial outward expansion trend. According to the principle of balance of objects, the calibration piece 1 sleeved on the periphery of the bonding sleeve 2 will generate a radial tensioning force between the bonding sleeve 2 and the bonding sleeve 2, so that the bonding sleeve 2 maintains a balanced state.

[0071] 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 the clamping of the processed part is achieved through the small deformation of the clamping surface 96.

[0072] During the continuous clamping process of the processed parts, the tension on the pull rod 3 increases continuously, and the force-sensitive chip 27 encapsulated on the stress plane 93 continuously detects the tension change of the pull rod 3. The data processing circuit 34 converts the collected tension information into an electrical signal according to the corresponding function relationship into a clamping force, and transmits it to the machine tool CNC system. The machine tool CNC system processes the relationship between the actual clamping force and the preset clamping force, and through feedback control, increases the oil pressure when the actual clamping force is insufficient, and reduces the oil pressure when the actual clamping force is too large, so that the actual clamping force finally reaches the expected value.

[0073] During the entire processing process, the three-axis vibration sensor 28 encapsulated on the stress plane 93 works continuously, and detects the vibration signal, centrifugal acceleration and dynamic balance state of the intelligent fixture in real time. The data processing circuit 34 processes the collected vibration and centrifugal acceleration signals, and determines whether the current processing parameters are appropriate based on the vibration signal. The current speed of the fixture is calculated based on the centrifugal acceleration, and the above information is sent to the CNC system wirelessly. Through negative feedback regulation, the current processing parameters are corrected so that the speed of the processed parts reaches the predetermined value. In addition, for possible tool collision, tool wear and other faults during the processing process, it is detected in real time whether there are abnormal peak signals and abnormal fluctuation signals. If there are abnormal signals, an alarm prompts, and the abnormal signal is sent to the CNC system and a shutdown command is sent to ensure safe and stable processing.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, the first feature "above" or "below" the 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.

[0075] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes 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.

[0076] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the 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 claims and their equivalents.

[0079] 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 principle of the present invention should be included in the protection scope 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) which are integrally connected from top to bottom, and the lower end of the support structure (503) is connected to a connecting flange (7); an adhesive expansion sleeve (2) is arranged outside the wedge-shaped structure (62), and a calibration piece (1) is arranged 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 arranged in the body (5) and the connecting flange (7); An annular shell (30) is provided on the support structure (503), and a switch signal switching circuit (52), a sensor signal switching circuit (51) and a data processing circuit (34) are provided in the annular shell (30); the data processing circuit (34) is wirelessly connected to a numerical control system; the sensor signal switching circuit (51) is connected to a force-sensitive chip (27) and a three-axis vibration sensor (28) via electrical signals; the sensor signal switching circuit (51) is connected to the data processing circuit (34) via electrical signals; the switch signal switching 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 truncated cone 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); 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); the second oil delivery hole 84 and the first oil delivery hole (68) are connected to the gap between the piston (6) and the truncated cone structure (502).

2. According to claim 1, the intelligent fixture for an intelligent manufacturing production line is 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 installed 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 a 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-shaped 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), and a support member (4) is sheathed on the transition structure (501), and the support member (4) is in contact with the lower part 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) in 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) which are 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 arranged 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 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), the bonding expansion sleeve (2) expands under the action of the wedge structure (62), and the calibration piece (1) is deformed in the radial direction 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 conversion 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 expected 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, causing the numerical control system to shut down.

Images