AU2022201185B1

AU2022201185B1 - Multi-energy field nano-lubricant micro-scale bone grinding processing measuring system

Info

Publication number: AU2022201185B1
Application number: AU2022201185A
Authority: AU
Inventors: Xin CUI; Changhe LI; Shubham Sharma; Min Yang; Yuying YANG; Yanbin Zhang; Zechen ZHANG; Zongming Zhou
Original assignee: Qingdao University of Technology; IK Gujral Punjab Technical University
Current assignee: Qingdao University of Technology; IK Gujral Punjab Technical University
Priority date: 2021-11-26
Filing date: 2022-02-22
Publication date: 2023-05-18
Anticipated expiration: 2042-02-22
Also published as: JP2023079156A; JP7349185B2; CN114083359A

Abstract

The present invention discloses a multi-energy field nano-lubricant micro-scale bone grinding processing measuring system, belonging to the technical field of grinding processing. The system includes a three-dimensional displacement workbench, an ultrasonic vibration device, a fluid charged atomization device and a measuring device, wherein a clamp is carried by the three-dimensional displacement workbench; the ultrasonic vibration device includes an ultrasonic generator and an ultrasonic electric spindle, and an amplitude-change pole in the ultrasonic electric spindle is provided with a grinding apparatus; the fluid charged atomization device includes a charged atomization nozzle and a plurality of ultrasonic vibration rods; the ultrasonic vibration rods are arranged in containers of different media, and the containers are all connected with a mixing chamber; a minimum quantity lubrication pump is connected between the mixing chamber and the charged atomization nozzle; and the measuring device includes a grinding force measuring part, and a micro-droplet measuring part and a grinding temperature measuring part arranged on side surfaces of the clamp. The present invention comprehensively considers the coupling effects of ultrasonic vibration, nanoparticle jet and charged atomization, and can detect nano-particle micro-droplets, grinding temperature and grinding force online in real time.

Description

MULTI-ENERGY FIELD NANO-LUBRICANT MICRO-SCALE BONE GRINDING PROCESSING MEASURING SYSTEM TECHNICAL FIELD

The present invention relates to the technical field of grinding processing, and particularly relates to a multi-energy field nano-lubricant micro-scale bone grinding processing measuring system.

BACKGROUND

In view of the problems of insufficient cooling capability in micro-grinding for total knee replacement in clinical surgery, poor visibility in operation regions, etc., a minimum quantity lubrication grinding processing technology, a nanoparticle jet minimum quantity lubrication technology, a charged atomization technology, etc. have gradually emerged. However, the inventors found that existing bone grinding technologies, such as ultrasonic vibration assisted micro-grinding, nanoparticle jet minimum quantity lubrication micro-grinding and nanoparticle jet minimum quantity lubrication charged atomization coupling micro-grinding, cannot meet the requirements in actual production and processing: (1) The ultrasonic vibration assisted micro-grinding can effectively reduce the grinding force damage, thermal damage and grinding apparatus blockage, but easily causes clinical problems such as low visibility in grinding operations and insufficient convective heat exchange capability during processing. (2) The nanoparticle jet minimum quantity lubrication micro-grinding can solve the bottlenecks of low convective heat exchange capability in grinding regions and low visibility in operation regions, but easily causes the problems of flying and scattering of micro-droplets during processing. (3) The nanoparticle jet minimum quantity lubrication charged atomization coupling micro-grinding well solves the problems of low visibility in clinical micro-grinding operations, insufficient convective heat exchange capability and flying and scattering of micro-droplets, but the device does not consider the problems of grinding dust discharge and serious grinding apparatus blockage. Ultrasonic vibration, nano-lubricant, charged atomization and micro-grinding processing technologies are combined to form an acoustic-electric-mechanical multi-energy field nano-lubricant micro-scale bone grinding processing technology which can effectively solve the above problems. However, how to accurately control processing parameters and realize acoustic-electric-mechanical multi-energy field coupling processes has always been the core problem that plagues this technology. In addition, the prior art lacks real-time online detection of the grinding force, grinding temperature and nano-particle micro-droplets of multi-energy field nano-lubricant micro-scale bone grinding.

SUMMARY

In view of the defects in the prior art, an objective of the present invention is to provide a multi-energy field nano-lubricant micro-scale bone grinding processing measuring system which comprehensively considers the coupling effects of ultrasonic vibration, nanoparticle jet and charged atomization and can detect nano-particle micro-droplets, grinding temperature and grinding force online in real time, thereby solving the problems of low visibility in clinical micro-grinding operations, insufficient convective heat exchange capability, flying and scattering of micro-droplets, etc. To achieve the foregoing objective, the present invention is implemented by the following technical solutions. The embodiments of the present invention provide a multi-energy field nano-lubricant micro-scale bone grinding processing measuring system, including: a three-dimensional displacement workbench, wherein a clamp for clamping a workpiece is carried by the three-dimensional displacement workbench; an ultrasonic vibration device, including an ultrasonic generator and an ultrasonic electric spindle connected through a lead wire, wherein an amplitude-change pole in the ultrasonic electric spindle is provided with a grinding apparatus for grinding the workpiece; a fluid charged atomization device, including a charged atomization nozzle and a plurality of ultrasonic vibration rods connected with the ultrasonic generator, wherein the ultrasonic vibration rods are arranged in containers of different media, the containers are all connected with a mixing chamber, and a minimum quantity lubrication pump is connected between the mixing chamber and the charged atomization nozzle; and a measuring device, including a grinding force measuring part arranged between the clamp and the three-dimensional displacement workbench, and a micro-droplet measuring part and a grinding temperature measuring part arranged on side surfaces of the clamp. As a further implementation, the grinding force measuring part includes a grinding dynamometer, an amplifier, information acquisition instruments and data analyzers connected in sequence; and the clamp is arranged above the three-dimensional displacement workbench through the grinding dynamometer. As a further implementation, the clamp includes a limiting seat and a chock block, a limiting groove for accommodating the workpiece is formed in the limiting seat, and the chock block is arranged in the limiting groove and is matched with clamping bolts to limit the workpiece. As a further implementation, a top of the limiting seat is detachably connected with flat plates, a plurality of pressing plates with adjustable intervals are mounted on the flat plates, and the pressing plates are used for limiting the workpiece in a height direction. As a further implementation, the ultrasonic generator is connected with two ultrasonic vibration rods, wherein one of the ultrasonic vibration rods is placed in a container containing normal saline, and the other ultrasonic vibration rod is placed in a container containing nano-particles; and the two containers are connected with an inlet of the mixing chamber respectively through hoses. As a further implementation, a high-voltage direct-current power supply is connected between the charged atomization nozzle and the workpiece. As a further implementation, the grinding temperature measuring part includes a thermocouple capable of being inserted into the workpiece, and the thermocouple is connected with the information acquisition instruments and the data analyzers in sequence. As a further implementation, the micro-droplet measuring part includes a camera for acquiring grinding images of the workpiece, and the camera is connected with the information acquisition instruments and the data analyzers in sequence. As a further implementation, an air flotation platform device is further arranged at a bottom of the three-dimensional displacement workbench, the air flotation platform device includes a bedplate, an air flotation vibration isolator and a support assembly, and the air flotation vibration isolator is mounted between the bedplate and the support assembly. As a further implementation, a magnetic conductive panel is arranged on an upper surface of the bedplate, and a honeycomb core plate is arranged inside the bedplate. Beneficial effects of the present invention are as follows: (1) In view of the problems of grinding apparatus blockage, grinding dust fusion, insufficient convective heat exchange capability, flying and scattering of micro-droplets, etc. in an existing micro-grinding process, the present invention realizes low-damage inhibited micro-grinding of biological bones by integrating ultrasonic vibration, medical nanoparticle jet lubrication and charged atomization. (2) The measuring device of the present invention includes the grinding force measuring part, and the micro-droplet measuring part and the grinding temperature measuring part arranged on side surfaces of the clamp, so that real-time on-line detection of nano-particle micro-droplets, grinding force and grinding temperature can be realized, the time is saved, and processing errors caused by multiple times of assembly are also avoided. (3) The grinding apparatus of the present invention is connected with the ultrasonic amplitude-change pole, so that the grinding apparatus generates vibration that can meet the processing requirements, and the vibration of the head of the grinding apparatus is similar to the reciprocating movement of a piston. Ultrasonic vibration assisted micro-grinding can enable a coolant in a grinding region to be subjected to the ultrasonic vibration of the grinding apparatus to generate high-frequency and alternating positive and negative hydraulic shock waves, and then, the coolant is more easily pumped into a grinding zone, thereby accelerating the update of the coolant in the grinding zone, greatly enhancing the convective heat exchange capability of a cooling medium, promoting the discharge of the grinding dust, and avoiding the blockage of the grinding apparatus. (4) In the present invention, the air flotation optical platform device is arranged, and a vibration isolation airbag in the air flotation vibration isolator is used as a basis and is matched with vibration reduction liquid and high-damping small hole air for vibration isolation, so that the vibration isolation performance is better. By arranging an adjusting valve at an inlet, the reaction time is shortened. The air flotation optical platform device is provided with a height adjusting mechanism which can solve the problems of bracket distortion and deformation caused by uneven ground. (5) The clamp is mounted on the grinding force measuring part of the present invention, and a workpiece is limited in three directions through the clamp to ensure information acquisition accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary examples of the present invention and descriptions thereof are used to explain the present invention, and do not constitute an improper limitation of the present invention. FIG. 1 is a schematic diagram of an overall structure according to one or more embodiments of the present invention. FIG. 2 is a cross-sectional diagram of an ultrasonic electric spindle according to one or more embodiments of the present invention. FIG. 3(a) to FIG. 3(d) are schematic diagrams of a production process of micro-cracks under interrupted cutting in an ultrasonic vibration micro-grinding process according to one or more embodiments of the present invention. FIG. 4 is a schematic diagram of conversion of the volume of grinding dust according to one or more embodiments of the present invention. FIG. 5 is a schematic diagram of a nano-particle minimum quantity lubrication charged atomization structure according to one or more embodiments of the present invention. FIG. 6 is a schematic diagram of a nano-particle micro-droplet, grinding force and grinding temperature measuring device according to one or more embodiments of the present invention. FIG. 7 is a schematic equipment diagram of mounting of a micro-grinding dynamometer and positioning and clamping of a workpiece according to one or more embodiments of the present invention. FIG. 8 is a schematic diagram of positioning of a workpiece according to one or more embodiments of the present invention. FIG. 9 is a cross-sectional diagram of a workpiece and a schematic diagram of connection with a temperature measuring device according to one or more embodiments of the present invention. FIG. 10 is a self-leveling air flotation vibration isolation optical platform according to one or more embodiments of the present invention. FIG. 11 is a schematic structural diagram of a honeycomb bedplate according to one or more embodiments of the present invention. FIG. 12 is a schematic diagram of a single-degree-of-freedom vibration isolation system according to one or more embodiments of the present invention. I denotes an ultrasonic vibration device, II denotes a fluid charged atomization device, III denotes a measuring device, and IV denotes an air flotation platform device. I-1 denotes an ultrasonic generator, 1-2 denotes an ultrasonic electric spindle, 1-3 denotes an ultrasonic transducer, 1-4 denotes an amplitude-change pole, I-5 denotes a grinding apparatus, and 1-6 denotes an endoscope. 11-1 denotes a clamp, 11-2 denotes a workpiece, 11-3 denotes a grounding wire, 11-4 denotes a high-voltage direct-current power supply, 11-5 denotes a lead wire, 11-6 denotes a charged atomization nozzle, 11-7 denotes a connecting wire, 11-8 denotes a first hose, 11-9 denotes nano-particles, 11-10 denotes an ultrasonic vibration rod, 11-11 denotes normal saline,

11-12 denotes a second hose, 11-13 denotes a mixing chamber, 11-14 denotes a third hose, and 11-15 denotes a minimum quantity lubrication pump. 111-1 denotes a first data analyzer, 111-2 denotes a first information acquisition instrument, 111-3 denotes an amplifier, 111-4 denotes a second data analyzer, 111-5 denotes a second information acquisition instrument, 111-6 denotes a third information acquisition instrument, 111-7 denotes a third data analyzer, 111-8 denotes a high-speed camera, 111-9 denotes a grinding dynamometer, and 111-10 denotes a thermocouple. 111-1101 denotes a gasket, 111-1102 denotes a first clamping bolt, 111-1103 denotes a mounting bolt, 111-1104 denotes a chock block, 111-1105 denotes a first flat plate, 111-1106 denotes a second clamping bolt, 111-1107 denotes a base, 111-1108 denotes an adjusting bolt, 111-1109 denotes a pressing plate, 111-1110 denotes a limiting seat, and 111-1111 denotes a second flat plate. IV-1 denotes a bedplate, IV-2 denotes an air flotation vibration isolator, IV-3 denotes a support column, IV-4 denotes a containing groove, IV-5 denotes a lifting foot, IV-6 denotes a connecting part, IV-7 denotes a bearing pad, IV-101 denotes a leather lining, IV-102 denotes a first frame plate, IV-103 denotes a second frame plate, IV-104 denotes a magnetic conductive panel, IV-105 denotes a support plate, and IV-106 denotes a honeycomb core plate.

DETAILED DESCRIPTION

Embodiment 1: This embodiment provides a multi-energy field nano-lubricant micro-scale bone grinding processing measuring system as shown in FIG. 1, including an ultrasonic vibration device I, a fluid charged atomization device II, a measuring device III, an air flotation platform device IV and a three-dimensional displacement workbench. The air flotation platform device IV is arranged at a bottom of the three-dimensional displacement workbench, and a workpiece 11-2 is clamped on the three-dimensional displacement workbench through a clamp11-1. In this embodiment, a bovine long bone is selected as a sample material. In view of the characteristics of large grinding force of the bovine long bone and easy occurrence of brittle fracture and crack damage during processing, the ultrasonic vibration device I is used to process the bovine long bone through an ultrasonic assisted micro-grinding process. As shown in FIG. 2, the ultrasonic vibration device I includes an ultrasonic generator I-1 and an ultrasonic electric spindle 1-2. An ultrasonic transducer 1-3 in the ultrasonic electric spindle 1-2 is connected with the ultrasonic generator I-1 through a lead wire. An alternating current of the ultrasonic generator I-1 provides a high-frequency electric vibration signal for the ultrasonic transducer 1-3. A housing of the ultrasonic electric spindle 1-2 is connected with an angle adjusting device to adjust a grinding angle. Meanwhile, the angle adjusting device is also mounted on the three-dimensional displacement workbench and moves in X, Y and Z directions. The angle adjusting device belongs to the prior art, and will not be repeated here. A grinding apparatus 1-5 is connected with an amplitude-change pole 1-4 of the ultrasonic vibration device I, so that the grinding apparatus I-5 may generate vibration that meets processing requirements. When the grinding apparatus I-5 is close to the bone material, the volume of a gap between the grinding apparatus and the bone decreases, and a coolant is discharged from the gap, thereby taking away heat and bone grinding dust. When the grinding apparatus I-5 leaves the bone material, the volume of the gap increases, thereby bringing a fresh coolant. The ultrasonic vibration device I is mounted on the spindle and rotates with the spindle. Ultrasonic vibration assisted micro-grinding can enable the coolant in a grinding region to be subjected to the ultrasonic vibration of the grinding apparatus to generate high-frequency and alternating positive and negative hydraulic shock waves, and then, the coolant is more easily pumped into a grinding zone, thereby accelerating the update of the coolant in the grinding zone, greatly enhancing the convective heat exchange capability of a cooling medium, promoting the discharge of the grinding dust, and avoiding the blockage of the grinding apparatus I-5. As shown in FIG. 3(a), when an instantaneous cutting thickness h of grinding particles is less than a minimum undeformed cutting thickness hmin, it means that the grinding particles do not cut into an unprocessed surface material and only form ploughing and sliding effects on a processed surface. As shown in FIG. 3(b) to FIG. 3(c), with the increase of h, when h>hmin, the grinding particles gradually cut into the unprocessed surface, the material gradually undergoes plastic deformation, and there is residual stress at the bottom of the plastic deformation. When h exceeds the minimum undeformed cutting thickness hmin, the material forms cuttings under the plastic shearing action, and at this time, the material is removed in a plastic manner. When the grinding particles cut into the unprocessed surface material, the instantaneous cutting thickness of the grinding particles increases from 0. As shown in FIG. 3(d), when h increases to a critical value, micro-cracks including lateral cracks and midline cracks are generated on a finally processed surface, and a grinding process changes from the removal of a plastic domain to the removal of a brittle domain. When h gradually decreases, h decreases to 0 when the grinding particles are evacuated from the unprocessed surface material again. Therefore, from the perspective of the instantaneous cutting thickness of a single grinding particle, intermittent grinding can be realized in ultrasonic vibration micro-grinding. Ultrasonic vibration mechanism: Ultrasonic waves refer to vibration waves with a sound frequency of 20 kHz or above that cannot cause a human auditory response. Ultrasonic vibration converts a high-frequency signal transmitted from an ultrasonic power supply into high-frequency vibration through a transducer, and then the vibration is transmitted to an ultrasonic cutter through an ultrasonic amplitude-change pole. The superposition of axial ultrasonic vibration amplitudes makes the instantaneous cutting depth of the grinding particles also periodically change. The ultrasonic vibration can change the maximum undeformed cutting thickness of the grinding dust and the average thickness of the grinding dust, improve the material removal rate and make nanoparticle jet infiltrate grinding wheels and workpieces more fully, thereby greatly improving the cooling and lubricating effects and the utilization rate of the nanoparticle jet. FIG. 4 is a schematic diagram of conversion of the volume of grinding dust during grinding. The relevant calculations are as follows: According to the principle of constant volume, the maximum thickness of the undeformed grinding dust can be deduced as:

4vw a 7 agmax vNC

wherein N, represents an effective sharpening number per unit area of the grinding apparatus; and C represents a ratio of the width of the grinding dust to the thickness of the grinding dust, that is, C = b, / a,. Similar rectangular hexahedral grinding dust is used to replace fish-shaped grinding dust, then V V = V, (2), Ns

wherein V represents a volume of each grinding particle; and V, represents a volume

of the workpiece material removed by grinding. Formula (2) may be written as:

v,,bp bgagl= " (3), vbN wherein bg represents an average width of the grinding dust, and bg = Cag (C represents a proportional coefficient which is related to a size of a tip angle of the grinding particles); -~- 1 ag represents an average thickness of the grinding dust, and ag =-a ;/l, represents a length of the undeformed grinding dust, and its value may be calculated according to a geometric contact length formula, that is, =(ad.)2 ; and b represents a grinding width of the grinding apparatus. Accordingly, it can be derived from Formula (3): a = a, F--iN V a,,| (4). INsJCC,

The maximum undeformed cutting thickness is as follows:

agmax= 2ag= 2 1 aJi !V, at (5). "" [NsisC v '' vNs Cd

Ultrasonic vibration assisted grinding mechanism: In a micro-grinding process, the processing mechanism is mainly affected by a ratio of the radius of the grinding particles to the undeformed cutting thickness. Since the radius of the grinding particles and the undeformed cutting thickness are at the same scale, the small change in the undeformed cutting thickness will have a greater impact on the processing mechanism. Considering the combined action of the size effect, the minimum cutting thickness principle, etc., the material removal mechanism in the present invention is different from that in traditional processing methods. Under a dynamic impact load, the dynamic fracture toughness of a material is reduced by 70% or more compared with the static fracture toughness. Therefore, the dynamic fracture toughness KID of a brittle material under ultrasonic vibration is calculated instead of the static fracture toughness Kic, that is: KID = 30%Kc (6). Therefore, in ultrasonic vibration end face micro-grinding, compared with traditional end face micro-grinding, additional ultrasonic vibration causes higher relative speed and acceleration between the grinding particles and the material, resulting in a greater dynamic impact effect between the grinding particles and the material. Considering the dynamic impact effect, it is easier to realize plastic domain grinding under ultrasonic vibration end face micro-grinding, and on the premise of plastic domain grinding, a higher material removal rate can be achieved. According to indentation fracture mechanics, when a processing load is less than a critical load, a biological bone material is mainly removed in a plastic manner; and when the processing load is greater than the critical load, the biological bone material is mainly removed in a brittle fracture manner. A critical load Fmax and a critical cutting thickness hmax under ultrasonic action are as follows:

Fmax = a ID -jKID (7), SHV

h =,p. Kv E KD)2 (8), HV HV

wherein a represents a geometric coefficient; p represents a constant; Hv represents

a hardness of the biological bone material; KID represents dynamic fracture toughness; Kv represents an influence coefficient with a value greater than 1, which is related to the hardness change of the biological bone material under ultrasonic action; and E represents an elastic modulus of the bone material. When KID increases and Hv decreases, hard and brittle materials easily change from brittleness to plasticity, and vice versa. Therefore, in the ultrasonic vibration assisted micro-grinding process, the introduction of ultrasonic vibration has a softening effect on the workpiece material, which reduces the hardness Hv of the workpiece material to a certain extent. Moreover, the introduction of ultrasonic vibration reduces the elastic return between the grinding apparatus and the workpiece, making the processing process more stable and reducing the dynamic impact effect, which is manifested by the increase of the dynamic fracture toughness KID of the material. Therefore, it can be seen from Formula (7) and Formula (8) that ultrasonic vibration increases the critical load and the critical cutting thickness, and the critical cutting depth is generally 2-3 times that of ordinary grinding. Further, as shown in FIG. 5, the fluid charged atomization device II includes a charged atomization nozzle 11-6, a minimum quantity lubrication pump 11-15, a mixing chamber11-13 and ultrasonic vibration rods 11-10. The ultrasonic vibration rods 11-10 are connected with the ultrasonic transducer 1-3. The number of the ultrasonic vibration rods 11-10 is determined according to the number of media to be mixed. In this embodiment, two ultrasonic vibration rods 11-10 are arranged. One of the ultrasonic vibration rods 11-10 is used to perform ultrasonic vibration on normal saline 11-11. The other ultrasonic vibration rod 11-10 is used to perform ultrasonic vibration on nano-particles 11-9. The nano-particles are evenly distributed through ultrasonic vibration. A container containing the nano-particles 11-9 is connected with a first inlet of the mixing chamber 11-13 through a first hose 11-8. A container containing the normal saline 11-11 is connected with a second inlet of the mixing chamber 11-13 through a second hose11-12. The normal saline 11-11 and the nano-particles 11-9 are mixed in the mixing chamber 11-13 to prepare a low-concentration nanoparticle jet. An outlet of the mixing chamber 11-13 is connected with the minimum quantity lubrication pump 11-15 through a third hose 11-14. The minimum quantity lubrication pump 11-15 is connected with the charged atomization nozzle 11-6 through a connecting wire 11-7. The charged atomization nozzle 11-6 is connected with a high-voltage direct-current power supply 11-4. After the minimum quantity lubrication pump 11-15 ejects the nanoparticle jet from the charged atomization nozzle 11-6, nanoparticle jet droplets are subjected to charged atomization through the high-voltage direct-current power supply 11-4 to form a group of charged micro-droplets. The group of charged droplets are transported to the surface of the workpiece 11-2 in a controllable and orderly manner under the drive of an electric field force (the workpiece 11-2 is clamped and fixed through the clamp 11-1), and mainly play roles of lubricating and cooling in the grinding movement. The high-voltage direct-current power supply 11-4 provides a high-voltage direct-current power supply for the system, the negative current of the high-voltage direct-current power supply 11-4 is transferred to a lead wire 11-5 of the charged atomization nozzle 11-6, and the positive current is transferred to the workpiece 11-2 through a lead wire and is grounded through a grounding wire 11-3, thereby ensuring that a stable electric field is formed between the nozzle and the workpiece. Further, as shown in FIG. 6, the measuring device III includes a micro-droplet measuring part, a grinding force measuring part and a grinding temperature measuring part. The micro-droplet measuring part includes a high-speed camera 111-8, a third information acquisition instrument 111-6 and a third data analyzer 111-7. The high-speed camera 111-8 is connected with the third information acquisition instrument 111-6 through a lead wire. The third information acquisition instrument 111-6 is connected with the third data analyzer111-7 through a lead wire. When the grinding apparatus 1-5 grinds the workpiece 11-2 and generates a grinding force, the high-speed camera 111-8 collects a moving track of nanoparticle jet micro-droplets under the coupling effects of a nanoparticle jet airflow field, a charged field and an ultrasonic high-frequency vibration impact energy field. The moving track is transmitted to the third information acquisition instrument 111-6 and finally transmitted to the third data analyzer 111-7. Thus, a formation mechanism of the nanoparticle jet micro-droplets on a micro-channel capillary at a grinding apparatus/biological bone constraint interface may be analyzed. As shown in FIG. 9, the grinding temperature measuring part includes a thermocouple 111-10, a first information acquisition instrument 111-2 and a first data analyzer111-1 connected in sequence. A measuring signal is transmitted to the first data analyzer111-1 through the first information acquisition instrument 111-2. The first data analyzer 111-1 displays a temperature of a working end of thethermocouple111-10, namely the workpiece 11-2. The bottom of the workpiece 11-2 is provided with a groove for inserting the thermocouple 111-10. This embodiment takes two thermocouples 111-10 as an example, which are marked as TC1 and TC2 respectively. Working ends of the thermocouples are respectively located 0.5 mm and 1 mm below the upper surface of the workpiece 11-2. The surface of the workpiece 11-2 close to the TC2 is marked as a surface a. The surface of the workpiece close to the TC is marked as a surface b. When the grinding apparatus I-5 performs grinding for a first time in an arrow direction (a->b), the TC2 is worn first, so that the TC2 is a first measuring end, and the TCl is a second measuring end. Further, as shown in FIG. 6, the grinding force measuring part includes a grinding dynamometer 111-9, an amplifier 111-3, a second information acquisition instrument 111-5 and a second data analyzer 111-4. The grinding dynamometer 111-9 is mounted below the clamp 11-1. The grinding dynamometer 111-9, the amplifier 111-3, the second information acquisition instrument 111-5 and the second data analyzer 111-4 are connected in sequence through lead wires. When the grinding apparatus I-5 grinds the workpiece 11-2 and generates a grinding force, the measuring signal is amplified by the amplifier111-3, then transmitted to the second information acquisition instrument 111-5, and finally transmitted to the second data analyzer 111-4 (the data analyzer is a programmable controller with a display screen). The magnitude of the grinding force is displayed. In this embodiment, as shown in FIG. 7, bases111-1107 are symmetrically mounted on two sides of the grinding dynamometer 111-9. The bases 111-1107 are connected with the grinding dynamometer 111-9 through bolts. The bases 111-1107 are made of a magnetic conductive metal material. After the workbench of the air flotation platform device IV is turned on, the workbench is magnetized so that the bases111-1107 of the grinding dynamometer 111-9 may be adsorbed on the workbench. Further, the clamp 11-1 is mounted on the grinding dynamometer 111-9. As shown in FIG.

8, the clamp 11-1 includes a limiting seat111-1110 and a chock block111-1104. The limiting seat 111-1110 is fixed on the workbench of the grinding dynamometer 111-9. In this embodiment, the limiting seat 111-1110 has a rectangular frame structure. A rectangular limiting groove is formed in the limiting seat111-1110. It can be understood that in other embodiments, the limiting seat111-1110 may also be set to be of other structures, as long as the limiting groove in the limiting seat 111-1110 is adapted to the workpiece 11-2 in shape. The workpiece 11-2 is attached to one corner of the limiting groove. The chock block 111-1104 is arranged between one side of the workpiece 11-2 and the inner wall of the limiting groove. The chock block 111-1104 is matched with a first clamping bolt111-1102 to limit the workpiece 11-2 in an X direction. The surface of one side of the chock block111-1104 is attached to a side surface of the workpiece 11-2. The surface of the other side of the chock block is attached to an end of the first clamping bolt111-1102. The first clamping bolt 111-1102 passes through the limiting seat111-1110. The workpiece 11-2 is limited in a Y direction through a second clamping bolt111-1106 and the limiting seat111-1110. The second clamping bolt 111-1106 passes through the limiting seat 111-1110. An end of the second clamping bolt can be attached to an end surface of the workpiece 11-2, and thus the other end surface of the workpiece 11-2 is closely attached to a side wall of the limiting groove. The workpiece 11-2 is limited in a Z direction through a plurality of pressing plates. A plurality of pressing plates are respectively arranged on two sides of the workpiece 11-2 in the X direction. In this embodiment, two pressing plates 111-1114 are arranged in the positive X direction of the workpiece 11-2. Certainly, in other embodiments, other numbers of pressing plates 111-1114 may also be arranged. Further, an upper surface of the chock block111-1104 is detachably connected with a first flat plate 111-1105. The fixation of the chock block 111-1104 is realized by screwing a mounting bolt 111-1103 in the first flat plate111-1105. A gasket 111-1101 is mounted between the bolt 111-1103 and the chock block111-1104. A second flat plate 111-1111 detachably connected with the limiting seat111-1110 is arranged on one side of the workpiece 11-2. The second flat plate111-1111 is provided with a strip-shaped hole. The mounting of the pressing plate 111-1114 is realized by screwing an adjusting bolt 111-1113 in the strip-shaped hole. The position of the pressing plate111-1114 may be adjusted by moving along the strip-shaped hole. The shape of the pressing plate 111-1114 is determined according to the height of the workpiece 11-2, as long as one end of the pressing plate 111-1114 can be in contact with the upper surface of the workpiece 11-2, and the other end can be in contact with the upper surface of the second flat plate 111-1111. When the length, width and height of the workpiece 11-2 are changed, the equipment can be adjusted through the second clamping bolt111-1106, the first clamping bolt 111-1102 and the pressing plate 111-1114, thereby meeting the dimensional change requirements of the workpiece 11-2. Further, as shown in FIG. 10, the air flotation platform device IV includes a bedplate IV-1, an air flotation vibration isolator IV-2 and a support assembly. The air flotation vibration isolator IV-2 is mounted between the bedplate IV-1 and the support assembly. In this embodiment, the support assembly includes a plurality of support columns IV-3, for example, includes 4 support columns. The oppositely arranged support columns IV-3 are connected through connecting parts IV-6 to strengthen the stability of the support columns IV-3, thereby improving the stability of the bedplate IV-1. An air flotation vibration isolator IV-2 is connected between the top of each of the support columns IV-3 and the bottom surface of the bedplate IV-1. The bottom of the support column IV-3 is provided with a containing groove IV-4. A lifting foot IV-5 is mounted in the containing groove IV-4. The height and flatness of the bedplate IV-1 are adjusted through the lifting feet IV-5. Preferably, an inner wall of the containing groove IV-4 is provided with threads. The containing groove IV-4 is connected with the lifting foot IV-5 through the threads. Still further, a bearing pad IV-7 is arranged at the bottom of the lifting foot IV-5 to bear the weight of the bedplate IV-1. Further, as shown in FIG. 11, the bedplate IV-1 is a honeycomb bedplate including two support plates IV-105 which are parallel to each other and are arranged at an interval. The circumferential direction of the support plate IV-105 is closed through a first frame plate IV-102. An outer surface of the first frame plate IV-102 is provided with a leather lining IV-101. An inner surface of the first frame plate is provided with a second frame plate IV-103 made of a damping material. An inner side of the second frame plate IV-103 is provided with a honeycomb core plate IV-106. The top of the support plate IV-105 on the upper side is provided with a magnetic conductive panel IV-104. In this embodiment, the magnetic conductive panel IV-104 is a stainless steel panel with high magnetic conductivity. The honeycomb core plate IV-106 is formed by bonding a square aluminum-zinc coated steel plate and a reinforced aluminum-zinc coated steel plate to each other. A groove is punched inside the square aluminum-zinc coated steel plate, therefore, the strength of the square aluminum-zinc coated steel plate is greater than that of a traditional square thin steel plate, so as to prevent a liquid from penetrating into a honeycomb layer and prevent the convection of gas in a threaded hole. Theory of air flotation platform vibration isolation system: Vibration isolation means that a suitable vibration isolator is arranged between a vibration source and vibration-isolated equipment to eliminate or inhibit the direct transmission of vibration. Each independent degree of freedom in a vibration isolation device may be simplified into a single-degree-of-freedom vibration isolation system, as shown in FIG. 12. A controlled object is a rigid mass block, the vibration isolator is a massless element formed by an ideal element and a damper in parallel, and the foundation is a rigid body with infinite mass. An oscillatory differential equation of the single-degree-of-freedom vibration isolation system is as follows: mz(t)+ c x(t)+k x(t)= cy(t)+ky(t) (9), wherein m represents load mass, k represents system rigidity, and c represents system damping. Assuming that x(t)= Xe'"' (10), 1) | y(t) = Yej" then:

.1 1+ 2 j{(f) x(t)= k + Jwc Yej, = f. y(t) (11). k-w'm+jwc 1+j{2 f)( 2

Assuming that x(t)= X(w)y(t) (12),

1+ 2j{( )

X(w)= (13),

wherein X(w) represents a vibration transmission function of the foundation of the system, and characterizes a transmission effect of the system on the vibration transmitted from the foundation to the isolated system object through the vibration isolation system. It can be seen from FIG. 12 that a transmission expression of the system is the same, then:

T(w)= X(w) (14).

The mode IT(w) of T(w) is called the steady-state amplitude transmission of the

system under the interference of ground simple harmonic vibration:

1+ 4[jg ( )]2

T(w) = (15), F42( f2+[1-( f)212 ff. f.

= (16), 2VL

f= w (17), 21

f = k (18), 2fr m wherein represents a damping ratio of the vibration isolation system, f represents

a vibration frequency of ground interference vibration, and fn represents an undamped

natural frequency of the vibration isolation system. The natural frequency refers to a free vibration frequency of the vibration system. The lower the natural frequency, the longer the free vibration period of the system. It can be seen from the above that reducing the natural frequency of the vibration isolation system and increasing the damping ratio of the system can effectively improve the vibration of a large vibration isolation platform on the ground. The foregoing descriptions are merely preferred embodiments of this application, but are not intended to limit this application. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of this application shall fall within the protection scope of this application.

Claims

CLAIMS What is claimed is:

1. A multi-energy field nano-lubricant micro-scale bone grinding processing measuring system, comprising: a three-dimensional displacement workbench, wherein a clamp for clamping a workpiece is carried by the three-dimensional displacement workbench; an ultrasonic vibration device, comprising an ultrasonic generator and an ultrasonic electric spindle connected through a lead wire, wherein an amplitude-change pole in the ultrasonic electric spindle is provided with a grinding apparatus for grinding the workpiece; a fluid charged atomization device, comprising a charged atomization nozzle and a plurality of ultrasonic vibration rods connected with the ultrasonic generator, wherein the ultrasonic vibration rods are arranged in containers of different media, the containers are all connected with a mixing chamber, and a minimum quantity lubrication pump is connected between the mixing chamber and the charged atomization nozzle; and a measuring device, comprising a grinding force measuring part arranged between the clamp and the three-dimensional displacement workbench, and a micro-droplet measuring part and a grinding temperature measuring part arranged on side surfaces of the clamp.

2. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein the grinding force measuring part comprises a grinding dynamometer, an amplifier, information acquisition instruments and data analyzers connected in sequence; and the clamp is arranged above the three-dimensional displacement workbench through the grinding dynamometer.

3. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 2, wherein the clamp comprises a limiting seat and a chock block, a limiting groove for accommodating the workpiece is formed in the limiting seat, and the chock block is arranged in the limiting groove and is matched with clamping bolts to limit the workpiece.

4. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 3, wherein a top of the limiting seat is detachably connected with flat plates, a plurality of pressing plates with adjustable intervals are mounted on the flat plates, and the pressing plates are used for limiting the workpiece in a height direction.

5. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein the ultrasonic generator is connected with two ultrasonic vibration rods, wherein one of the ultrasonic vibration rods is placed in a container containing normal saline, and the other ultrasonic vibration rod is placed in a container containing nano-particles; and the two containers are connected with an inlet of the mixing chamber respectively through hoses.

6. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1 or 5, wherein a high-voltage direct-current power supply is connected between the charged atomization nozzle and the workpiece.

7. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein the grinding temperature measuring part comprises a thermocouple capable of being inserted into the workpiece, and the thermocouple is connected with the information acquisition instruments and the data analyzers in sequence.

8. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein the micro-droplet measuring part comprises a camera for acquiring grinding images of the workpiece, and the camera is connected with the information acquisition instruments and the data analyzers in sequence.

9. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein an air flotation platform device is further arranged at a bottom of the three-dimensional displacement workbench, the air flotation platform device comprises a bedplate, an air flotation vibration isolator and a support assembly, and the air flotation vibration isolator is mounted between the bedplate and the support assembly.

10. The multi-energy field nano-lubricant micro-scale bone grinding processing measuring system according to claim 1, wherein a magnetic conductive panel is arranged on an upper surface of the bedplate, and a honeycomb core plate is arranged inside the bedplate.