CN109318064B - Ultrasonic plane grinding method and system with double vibration reduction and double sealing for flange plate - Google Patents
Ultrasonic plane grinding method and system with double vibration reduction and double sealing for flange plate Download PDFInfo
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- CN109318064B CN109318064B CN201811333012.0A CN201811333012A CN109318064B CN 109318064 B CN109318064 B CN 109318064B CN 201811333012 A CN201811333012 A CN 201811333012A CN 109318064 B CN109318064 B CN 109318064B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/007—Weight compensation; Temperature compensation; Vibration damping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses an ultrasonic plane grinding system with double vibration reduction and double sealing for a flange, wherein an annular groove, a pin hole and a vibration isolation groove are formed in the flange of an amplitude transformer, an O-shaped sealing ring in the annular groove is used for sealing when the flange is matched with the inner side of a tool handle, a pin is fixedly arranged in the pin hole on one side of the flange and matched with the pin hole on the tool handle, the rotation of the amplitude transformer is prevented, and the vibration isolation groove weakens the transmission of vibration of the amplitude transformer to the flange. And a polytetrafluoroethylene gasket is added between the gland and the amplitude transformer flange to prevent the vibration of the flange from being transmitted to the cutter handle through the gland nut, and sealing glue is coated on the end face of the gland and threads during assembly, so that the sealing effect is further enhanced. The grinding wheel disc is fixed at the front end of the amplitude transformer through the nut, and the longitudinal-bending, longitudinal-torsion, radial-torsion and other composite ultrasonic vibration of the grinding wheel disc can be realized according to different amplitude transformer forms. The ultrasonic knife handle device greatly reduces or eliminates the influence of vibration of the amplitude transformer on the ultrasonic knife handle, and indirectly expands the application range of ultrasonic auxiliary processing.
Description
Technical field:
the invention relates to ultrasonic vibration processing equipment, in particular to an ultrasonic plane grinding method and system with a flange plate with double vibration reduction and double sealing.
The background technology is as follows:
with the wider and wider application of hard and brittle materials represented by optical glass, advanced ceramics and composite materials thereof in the fields of aerospace, automobile manufacturing, medical appliances and the like, the advantages of ultrasonic processing technology in the aspect of processing the hard and brittle materials are more and more obvious. Ultrasonic vibration machining is a machining technique in which a tool or a workpiece is subjected to high-frequency vibration on the basis of a machining method such as ordinary cutting, grinding, drilling, or the like. The application of the method is wider and wider, and the auxiliary processing variety is wider and wider. Experiments show that under the ultrasonic auxiliary grinding mode, the processed surface can obtain better surface microstructure, high processing precision, good surface quality and excellent fatigue resistance, and the service life of the grinding wheel is prolonged.
The invention comprises the following steps:
the technical problems to be solved by the invention are as follows: the contradiction that the theory and practice of the node design of the acoustic system of the existing ultrasonic product are not consistent is overcome, in theory, the node/node disk is a point or a line and does not generate any vibration, and in fact, the node disk must be a surface or a body due to the requirement of supporting rigidity, and the vibration of the node disk is unavoidable). In order to avoid the influence of vibration of the section disc on the precision of the spindle caused by the vibration of the combined cutter handle and the spindle, the invention provides the ultrasonic plane grinding system with double vibration reduction and double sealing functions, which greatly reduces the influence of vibration of the amplitude transformer on the ultrasonic cutter handle, ensures the precision of the spindle of a machine tool and simultaneously expands the practicability and stability of ultrasonic grinding.
The technical scheme of the invention is as follows:
an ultrasonic plane grinding method with double vibration reduction and double sealing for a flange plate comprises the following steps:
a. designing according to a local resonance design theory: when the ratio of the diameter of the abrasive disc to the diameter of the small end of the assembled amplitude transformer is more than 10:3, calculating the geometric dimension of the amplitude transformer by taking a certain inherent frequency of the large abrasive disc as the designed resonant frequency of the amplitude transformer and the energy converter or calculating the geometric dimension of the abrasive disc by taking the frequency of the amplitude transformer and the energy converter as the designed frequency of the abrasive disc, wherein the abrasive disc vibrates with the inherent frequency close to the resonant frequency in the vibration system; according to different forms of the amplitude transformer, the large grinding wheel disk presents compound vibration in two dimensions of longitudinal-bending, bending-torsion, longitudinal-radial, longitudinal-torsion-bending, radial-torsion-longitudinal and above; the large grinding wheel disc is connected with the amplitude transformer through a large-area compression nut;
b. the amplitude transformer adopts a straight rod or a conical rod, spiral grooves are formed on the amplitude transformer according to the requirement to form compound vibration of different forms of the grinding wheel, a flange is arranged at a vibration node, and a rear cover plate, a piezoelectric ceramic plate, a copper electrode plate and the amplitude transformer are connected together by using a fastening bolt so that the transducer and the amplitude transformer form an integrated vibration unit;
c. the connecting side of the flange plate and the transducer is provided with a ring groove, an O-shaped sealing ring is placed, meanwhile, the flange plate and the knife handle are provided with pin holes, the pin is tightly matched with the flange, and the pin is in clearance fit with the holes on the knife handle, so that the amplitude transformer is prevented from rotating when being pressed, and the other side of the flange plate is provided with a vibration isolation groove, so that the vibration of the amplitude transformer is isolated from being transmitted to the flange plate;
d. the flange of the amplitude transformer is tightly matched with the inner side of the ultrasonic knife handle, an annular polytetrafluoroethylene gasket is added between the gland and the flange, the gasket and the amplitude transformer are fixed in the knife handle through the gland, and the gasket mainly plays a role in isolating the vibration of the end face of the amplitude transformer from being transmitted to the knife handle through the gland; when the tool is assembled, sealant is coated between the gland threads and the tool body threads as well as between the tool handle and the gland end surfaces, and gaps between the tool handle and the gland end surfaces as well as between the tool handle and the threads are sealed so as to prevent water seepage into the tool body cavity; the wireless transmission disc is connected with the transducer and assembled on the outer side of the cutter handle.
The grinding end face of the large grinding wheel disc is provided with uniformly distributed notches along the circumferential direction, so that the cutting fluid and the abrasive dust are conveniently discharged during grinding, the web plate of the grinding wheel disc is subjected to hollowed-out treatment, the grinding fluid is conveniently flowed into a grinding area and timely spread of grinding heat, and the weight of the grinding wheel disc is also reduced.
The non-resonance design theory can enable a vibration system formed by the grinding wheel disc and the amplitude transformer to resonate with a certain-order natural frequency of the grinding wheel disc by adjusting the structural size of the amplitude transformer or the grinding wheel disc, so that a better vibration effect is achieved.
Vibration isolation grooves and annular grooves for placing O-shaped sealing rings are simultaneously formed in two sides of the flange plate, and the two vibration isolation grooves weaken radial transmission of vibration of the amplitude transformer to the flange plate; the O-shaped sealing ring is arranged, so that the grinding fluid from the gap of the flange is prevented from leaking into the cutter body cavity, and the vibration of the flange is prevented from being transmitted to the cutter body along the contact surface of the cutter body and the flange, and the vibration absorption and isolation effects are achieved; the annular polytetrafluoroethylene gasket is added between the flange plate and the gland, and the vibration of the flange plate is isolated from being transmitted to the cutter handle along the compression nut, so that the influence of vibration of the amplitude transformer on the cutter handle is reduced to the greatest extent, the precision of the main shaft is guaranteed not to be affected, and meanwhile, the sealing glue is coated on the end face and the threads of the gland nut and between the threads of the cutter body, so that the sealing effect is further enhanced, and the reliable vibration reduction and sealing functions are achieved.
The inner side of the ultrasonic knife handle is provided with a pin hole, and the pin fixed on the flange of the amplitude transformer is matched with the pin hole on the knife handle to prevent the amplitude transformer from rotating when the compression nut is compressed; the wireless transmission disc is in interference fit with the cutter handle, and the joint of the wireless transmission disc and the cutter handle is perforated, so that the induction coil is connected with the transducer.
The utility model provides a ring flange has two vibration damping and two sealed supersound plane grinding systems, includes emery wheel, amplitude transformer, transducer, supersound handle of a knife and wireless transmission dish, characterized by: the rear cover plate, the piezoelectric ceramic plate, the copper electrode plate and the amplitude transformer are connected together by using a fastening bolt, so that the transducer and the amplitude transformer form an integrated vibration unit; the ultrasonic vibration-proof device is characterized in that a flange plate is arranged on the amplitude transformer, an annular groove is formed in the connecting side of the flange plate and the transducer and used for placing an O-shaped sealing ring, a vibration isolation groove is formed in the other side of the flange plate, the vibration isolation groove corresponds to the annular groove, a pin hole is formed in the flange plate and the ultrasonic knife handle, the flange plate and the ultrasonic knife handle are connected through pins, the transducer and the amplitude transformer are located in an inner cavity of the ultrasonic knife handle, a threaded section is arranged at the small end of the amplitude transformer, an annular polytetrafluoroethylene gasket and a gland nut are arranged on the inner side of the threaded section, sealing glue is coated on the end faces of the threaded section, the tetrafluoroethylene gasket and the gland nut and used for conducting gap sealing, the wireless transmission plate is connected with the transducer and assembled on the outer side of the ultrasonic knife handle, and the outer side of the threaded section is fixedly connected with a grinding wheel through a gland.
Designing according to a local resonance design theory: when the ratio of the diameter of the abrasive disc to the diameter of the small end of the assembled amplitude transformer is larger than 10:3, the geometric dimension of the amplitude transformer can be calculated by taking a certain inherent frequency of the large abrasive disc as the designed resonant frequency of the amplitude transformer and the energy transducer, or the geometric dimension of the abrasive disc can be calculated by taking the combined frequency of the amplitude transformer and the energy transducer as the designed frequency of the abrasive disc, and the abrasive disc vibrates with the inherent frequency close to the resonant frequency in a vibration system formed at the moment; depending on the form of the horn, the large grinding wheel disk exhibits compound vibrations in two dimensions, longitudinal-bending, bending-twisting, longitudinal-radial, longitudinal-torsional-bending, radial-torsional-longitudinal, and the like.
The grinding wheel is a butterfly type, a bowl type or a cup type; the disc surface of the grinding wheel is hollow or not hollow, the amplitude transformer is cylindrical or conical, and a spiral groove or a spiral hole is formed in the amplitude transformer or is not formed in the amplitude transformer.
The grinding end face of the grinding wheel is provided with uniformly distributed notches along the circumferential direction, so that cutting fluid and abrasive dust are conveniently discharged during grinding, the grinding end face of the grinding wheel is not provided with uniformly distributed notches along the circumferential direction, and the processing difficulty is reduced.
The pressing washer enables the O-shaped sealing ring to be tightly matched with the inner side of the ultrasonic knife handle, so that the sealing vibration isolation effect is achieved, and cutting fluid is prevented from penetrating; the wireless transmission disc is in interference fit with the ultrasonic knife handle, and holes are formed in the joint of the wireless transmission disc and the ultrasonic knife handle, so that the induction coil is connected with the transducer.
The beneficial effects of the invention are as follows:
1. the ultrasonic plane grinding system is designed by adopting a non-resonant design theory, so that the complexity brought by the whole system full-resonant design can be avoided, the design of the resonant system is simplified, and the vibration of the grinding wheel disc is more ideal.
2. The invention adopts a mode of forming the double vibration isolation grooves and adding the O-shaped sealing ring, the annular gasket and the compression nut to coat waterproof sealant, thereby realizing the functions of double vibration reduction and double sealing, greatly reducing or eliminating the influence of vibration of the amplitude transformer on the ultrasonic knife handle, i.e. avoiding the influence of the vibration of the cone part of the knife handle or the blind rivet on the main shaft of the machine tool. Has great significance on the reliability and stability of the ultrasonic auxiliary processing mode, and indirectly expands the application range of the ultrasonic auxiliary processing.
3. The ultrasonic-assisted vibration grinding device is reasonable in design, compact in structure, easy to popularize and implement and good in economic benefit, and ultrasonic-assisted vibration grinding of the large-sized grinding wheel disc is realized.
Description of the drawings:
FIG. 1 is a schematic diagram of an ultrasonic surface grinding system assembly;
FIG. 2 is an exploded schematic view of an ultrasonic surface grinding system;
FIG. 3 is a schematic view of a straight-bar longitudinal vibration horn in semi-section;
FIG. 4 is a schematic view of a planar hollowed out grooved pulley disk;
FIG. 5 is a butterfly shaped un-hollowed out un-grooved wheel disc;
FIG. 6 is a schematic view of a conical longitudinal composite horn;
FIG. 7 is a cup-shaped un-hollowed out un-grooved pulley disk;
fig. 8 is a cup-shaped hollowed-out ungrooved grinding wheel disc.
The specific embodiment is as follows:
examples: referring to fig. 1-8, a 1-wireless transmission disc, a 2-ultrasonic knife handle, a 3-O-shaped sealing ring, a 4-pin, a 5-transducer, a 6-amplitude transformer, a 7-gasket, an 8-gland nut, a 9-grinding wheel, a 10-gland, an 11-annular groove/vibration isolation groove, a 12-pin hole and a 13-vibration isolation groove are shown.
The ultrasonic vibration amplitude transformer consists of a transducer 5 and an amplitude transformer 6, and a rear cover plate, a piezoelectric ceramic plate, a copper electrode plate and the amplitude transformer 6 are connected together by fastening bolts, so that the transducer 5 and the amplitude transformer 6 form the ultrasonic vibration amplitude transformer. During assembly, the back cover plate, the piezoelectric ceramic plate and the copper electrode plate are required to be cleaned by acetone, so that the cleanliness of the connecting surface is ensured.
An annular groove 11 is formed in a flange of the amplitude transformer 6 to place the O-shaped sealing ring 3, a pin hole 12 is provided with a pin 4, when the amplitude transformer 6 is assembled with the ultrasonic knife handle 2, the pretightening force of the gland nut 8 is required to be accurately controlled, the tight fit between the O-shaped sealing ring 3 and the contact surface of the inner side of the ultrasonic knife handle 2 is ensured, the dual effects of sealing and positioning are achieved, and meanwhile, sealing glue is coated between the threads of the knife body and the end surface and the threads of the gland nut 8, so that the sealing effect is further ensured; the pin 4 and the pin hole on the flange are in win-win fit, and the pin 4 and the pin hole 12 are in clearance fit, so that the pin 4 fixed on the flange plate is correspondingly assembled with the pin hole on the ultrasonic knife handle 2, and the rotation of the amplitude transformer 6 under the stress condition is prevented.
Uniformly distributed notches are formed in the circumferential direction of the end face of the grinding wheel 9, so that chip removal during grinding is facilitated; the web of the grinding wheel 9 is hollowed out, so that a large amount of cutting fluid can flow into a grinding area quickly, the temperature of the grinding area is reduced, and the discharge of grinding scraps is accelerated; the grinding wheel 9 is connected with the amplitude transformer 6 through a specially designed large-area compression nut, and a contact surface is required to be polished during connection, so that complete contact and efficient transmission of sound waves are ensured.
And punching holes on the contact part of the ultrasonic knife handle 2 and the wireless transmission disc 1, and connecting the wireless transmission disc 1 with the transducer 5, wherein the cooperation of the wireless transmission disc 1 and the ultrasonic knife handle 2 performs interference fit, and the wireless transmission disc 1 is fixed on the outer side of the ultrasonic knife handle 2.
Designing according to a local resonance design theory: when the ratio of the diameter of the abrasive disc to the diameter of the small end of the assembled amplitude transformer is larger than 10:3, the geometric dimension of the amplitude transformer can be calculated by taking a certain inherent frequency of the large abrasive disc as the designed resonant frequency of the amplitude transformer and the energy transducer, or the geometric dimension of the abrasive disc can be calculated by taking the combined frequency of the amplitude transformer and the energy transducer as the designed frequency of the abrasive disc, and the abrasive disc vibrates with the inherent frequency close to the resonant frequency in a vibration system formed at the moment; depending on the form of the horn, the large grinding wheel disk exhibits compound vibrations in two dimensions, longitudinal-bending, bending-twisting, longitudinal-radial, longitudinal-torsional-bending, radial-torsional-longitudinal, and the like.
The non-resonance design theory can enable a vibration system formed by the grinding wheel disc and the amplitude transformer to resonate with a certain-order natural frequency of the grinding wheel disc by adjusting the structural size of the amplitude transformer or the grinding wheel disc, so that a better vibration effect is achieved.
The foregoing description is only illustrative of the present invention and is not intended to limit the invention in any way, and any simple modification, equivalent variation and variation of the above embodiments according to the technical principles of the present invention still fall within the scope of the present invention.
Claims (8)
1. An ultrasonic plane grinding method with double vibration reduction and double sealing for a flange plate comprises the following steps:
a. designing according to a local resonance design theory: when the ratio of the diameter of the abrasive disc to the diameter of the small end of the assembled amplitude transformer is more than 10:3, calculating the geometric dimension of the amplitude transformer by taking a certain inherent frequency of the large abrasive disc as the designed resonant frequency of the amplitude transformer and the energy converter or calculating the geometric dimension of the abrasive disc by taking the frequency of the amplitude transformer and the energy converter as the designed frequency of the abrasive disc, wherein the abrasive disc vibrates with the inherent frequency close to the resonant frequency in the vibration system; according to different forms of the amplitude transformer, the large grinding wheel disk presents compound vibration in two dimensions of longitudinal-bending, bending-torsion, longitudinal-radial, longitudinal-torsion-bending, radial-torsion-longitudinal and above; the large grinding wheel disc is connected with the amplitude transformer through a large-area compression nut;
b. the amplitude transformer adopts a straight rod or a conical rod, spiral grooves are formed on the amplitude transformer according to the requirement to form compound vibration of different forms of the grinding wheel, a flange is arranged at a vibration node, and a rear cover plate, a piezoelectric ceramic plate, a copper electrode plate and the amplitude transformer are connected together by using a fastening bolt so that the transducer and the amplitude transformer form an integrated vibration unit;
c. the connecting side of the flange plate and the transducer is provided with a ring groove, an O-shaped sealing ring is placed, meanwhile, the flange plate and the knife handle are provided with pin holes, the pin is tightly matched with the flange, and the pin is in clearance fit with the holes on the knife handle, so that the amplitude transformer is prevented from rotating when being pressed, and the other side of the flange plate is provided with a vibration isolation groove so as to isolate the vibration of the amplitude transformer from being transmitted to the flange plate;
d. the flange of the amplitude transformer is tightly matched with the inner side of the ultrasonic knife handle, an annular polytetrafluoroethylene gasket is added between the gland and the flange, the gasket and the amplitude transformer are fixed in the knife handle through the gland, and the gasket mainly plays a role in isolating the vibration of the end face of the amplitude transformer from being transmitted to the knife handle through the gland; when the tool is assembled, sealant is coated between the gland threads and the tool body threads as well as between the tool handle and the gland end surfaces, and gaps between the tool handle and the gland end surfaces as well as between the tool handle and the threads are sealed so as to prevent water seepage into the tool body cavity; the wireless transmission disc is connected with the transducer and assembled on the outer side of the cutter handle.
2. The ultrasonic face grinding method with double vibration reduction and double sealing for the flange plate according to claim 1, characterized in that: the grinding end face of the large grinding wheel disc is provided with uniformly distributed notches along the circumferential direction, so that the cutting fluid and the abrasive dust are conveniently discharged during grinding, the web plate of the grinding wheel disc is subjected to hollowed-out treatment, the grinding fluid is conveniently flowed into a grinding area and timely spread of grinding heat, and the weight of the grinding wheel disc is also reduced.
3. The ultrasonic face grinding method with double vibration reduction and double sealing for the flange plate according to claim 1, characterized in that: the non-resonance design theory can enable a vibration system formed by the grinding wheel disc and the amplitude transformer to resonate with a certain-order natural frequency of the grinding wheel disc by adjusting the structural size of the amplitude transformer or the grinding wheel disc, so that a better vibration effect is achieved.
4. The ultrasonic face grinding method with double vibration reduction and double sealing for the flange plate according to claim 1, characterized in that: vibration isolation grooves and annular grooves for placing O-shaped sealing rings are simultaneously formed in two sides of the flange plate, and the two vibration isolation grooves weaken radial transmission of vibration of the amplitude transformer to the flange plate; the O-shaped sealing ring is arranged, so that the grinding fluid from the gap of the flange is prevented from leaking into the cutter body cavity, and the vibration of the flange is prevented from being transmitted to the cutter body along the contact surface of the cutter body and the flange, and the vibration absorption and isolation effects are achieved; the annular polytetrafluoroethylene gasket is added between the flange plate and the gland, and the vibration of the flange plate is isolated from being transmitted to the cutter handle along the compression nut, so that the influence of vibration of the amplitude transformer on the cutter handle is reduced to the greatest extent, the precision of the main shaft is guaranteed not to be affected, and meanwhile, the sealing glue is coated on the end face and the threads of the gland nut and between the threads of the cutter body, so that the sealing effect is further enhanced, and the reliable vibration reduction and sealing functions are achieved.
5. The ultrasonic face grinding method with double vibration reduction and double sealing for the flange plate according to claim 4, characterized in that: the inner side of the ultrasonic knife handle is provided with a pin hole, and the pin fixed on the flange of the amplitude transformer is matched with the pin hole on the knife handle to prevent the amplitude transformer from rotating when the compression nut is compressed; the wireless transmission disc is in interference fit with the cutter handle, and the joint of the wireless transmission disc and the cutter handle is perforated, so that the induction coil is connected with the transducer.
6. The utility model provides a ring flange has two vibration damping and two sealed supersound plane grinding systems, includes emery wheel, amplitude transformer, transducer, supersound handle of a knife and wireless transmission dish, characterized by: the rear cover plate, the piezoelectric ceramic plate, the copper electrode plate and the amplitude transformer are connected together by using a fastening bolt, so that the transducer and the amplitude transformer form an integrated vibration unit; the amplitude transformer is provided with a flange plate, the connection side of the flange plate and the energy converter is provided with a ring groove for placing an O-shaped sealing ring, the other side of the flange plate is provided with a vibration isolation groove corresponding to the ring groove, the flange plate and the ultrasonic knife handle are provided with pin holes, the two are connected through pins, the energy converter and the amplitude transformer are positioned in the inner cavity of the ultrasonic knife handle, the small end of the amplitude transformer is provided with a thread section, the inner side of the thread section is provided with an annular polytetrafluoroethylene gasket and a gland nut, the end surfaces of the thread section, the polytetrafluoroethylene gasket and the gland nut are coated with sealant for gap sealing, the wireless transmission disc is connected with the transducer and assembled on the outer side of the ultrasonic knife handle, and the outer side of the thread section is fixedly connected with the grinding wheel through a gland; the grinding wheel is a butterfly type, a bowl type or a cup type; the disc surface of the grinding wheel is hollow or not hollow, the amplitude transformer is cylindrical or conical, a spiral groove or a spiral hole is formed in the amplitude transformer, or the amplitude transformer is not provided with the spiral groove or the spiral hole; the grinding end face of the grinding wheel is provided with uniformly distributed notches along the circumferential direction, so that cutting fluid and abrasive dust are conveniently discharged during grinding, the grinding end face of the grinding wheel is not provided with uniformly distributed notches along the circumferential direction, and the processing difficulty is reduced.
7. The ultrasonic face grinding system with double vibration reduction and double sealing for the flange plate according to claim 6, characterized in that: designing according to a local resonance design theory: when the ratio of the diameter of the abrasive disc to the diameter of the small end of the assembled amplitude transformer is larger than 10:3, the geometric dimension of the amplitude transformer can be calculated by taking a certain inherent frequency of the large abrasive disc as the designed resonant frequency of the amplitude transformer and the energy transducer, or the geometric dimension of the abrasive disc can be calculated by taking the combined frequency of the amplitude transformer and the energy transducer as the designed frequency of the abrasive disc, and the abrasive disc vibrates with the inherent frequency close to the resonant frequency in a vibration system formed at the moment; depending on the form of the horn, the large grinding wheel disk exhibits compound vibrations in two dimensions, longitudinal-bending, bending-twisting, longitudinal-radial, longitudinal-torsional-bending, radial-torsional-longitudinal, and the like.
8. The ultrasonic face grinding system with double vibration reduction and double sealing for the flange plate according to claim 6, characterized in that: the polytetrafluoroethylene gasket enables the O-shaped sealing ring to be tightly matched with the inner side of the ultrasonic knife handle, so that the sealing vibration isolation effect is achieved, and cutting fluid is prevented from penetrating; the wireless transmission disc is in interference fit with the ultrasonic knife handle, and holes are formed in the joint of the wireless transmission disc and the ultrasonic knife handle, so that the induction coil is connected with the transducer.
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| CN111043288A (en) * | 2019-12-31 | 2020-04-21 | 恒安(中国)纸业有限公司 | Speed reducer output shaft sealing gland and sealing process thereof |
| CN111168485B (en) * | 2020-02-11 | 2024-06-07 | 华侨大学 | Ultrasonic vibration auxiliary self-rotation grinding machine tool and main shaft device thereof |
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