99 results about "Bending vibration" patented technology

A piezoelectric device includes a piezoresonator body and a set of electrodes disposed on the piezoresonator body. The piezoresonator body includes a bulk region and a contact element integral with and protruding from the bulk region, and further includes opposing first and second surfaces. A pair of excitation electrodes are disposed on the first surface. A common electrode is disposed on the second surface. The piezoresonator body is characterized by a longitudinal axis and a transverse axis, and further characterized by a natural resonant frequency (v1) of first-order longitudinal standing vibrations along the transverse axis and a natural resonant frequency (v2) of second-order bending standing vibrations along the longitudinal axis, with v1 < v2 ≤ 1.1v1.

The invention provides a double-constraint radial transduction ultrasonic motor, which comprises an annular rotor and a plurality of stators distributed in the annular rotor in an annular array, and is characterized in that each stator comprises a metal elastomer, a left fixing hole, a right fixing hole, a left piezoelectric ceramic, a right piezoelectric ceramic and an elastic blade group for forming pre-pressure on the annular rotor, the working vibration mode of the stator is first-order standing wave type bending vibration, the left fixing hole and the right fixing hole are formed in the metal elastic body and are formed in the two wave node positions of the first-order standing wave type bending vibration respectively, namely, the amplitude is zero during vibration, and the elastic blade set comprises a left-end elastic blade, a middle elastic blade and a right-end elastic blade. The vibration asymmetry of the metal elastomer can be effectively improved, the structural rigidity of the motor can be improved, the output torque of the motor can be improved, the energy transmission efficiency and the driving capacity can be improved, and the overall performance of the motor can be remarkably improved.

A method for determining variables influencing a total zero point error of a Coriolis mass flow meter comprises: exciting a vibration of a bending vibration mode; measuring a first total zero point error T at a flow of zero; ascertaining a first damping value D of the vibration of the bending vibration mode; measuring an exciter-independent zero point error I during a decaying vibration of the bending vibration mode at a flow of zero; ascertaining a first exciter-dependent contribution E to the first total zero point error T based on the first total zero point error T and based on the exciter-independent zero point error I; and ascertaining a sensitivity factor S for the bending vibration mode based on the first exciter-dependent contribution E to the total zero point error T and based on the first damping value D.

Disclosed is a multi-modal and multi-degree-of-freedom piezoelectric active vibration isolation platform and a working method therefor. The piezoelectric active vibration isolation platform includes an upper platform, a lower platform, a control module, and four vibration isolation modules, where the vibration isolation module includes a passive vibration isolation unit and an active vibration isolation unit; the passive vibration isolation unit includes an upper connector, a lower connector, a cross Hooke hinge, and a first acceleration sensor; the active vibration isolation unit includes a fixed beam, a pre-tightening bolt, a second acceleration sensor, and a driving component; the platform can provide active vibration isolation for the longitudinal (axial) vibration and the bending vibration in any radial direction of a vibration isolation object, and has the advantages of fast response, resistance to electromagnetic interference, and light weight.

The invention discloses a longitudinal bending composite type six-degree-of-freedom piezoelectric active vibration isolation platform and a working method thereof. The vibration isolation platform adopts a modular structural design, a vibration isolation connecting platform and a base platform are sequentially arranged from top to bottom and are connected through four uniformly distributed vibration isolation modules, and each vibration isolation module forms a multi-stage vibration transmission structure through a fixed base, a transducer base, a piezoelectric transducer, an amplitude-change pole, a pre-tightening bolt and a small flexible hinge. The control module collects feedback signals of a first acceleration sensor arranged on the vibration isolation connecting platform and feedforward signals of a second acceleration sensor arranged on the base platform, and outputs 12-channel control signals to the piezoelectric transducers of the vibration isolation modules after signal processing. The piezoelectric transducer is driven to generate a composite motion mode of longitudinal vibration and multidirectional bending vibration, and active suppression of longitudinal vibration and radial bending vibration in any direction of a vibration isolation object is achieved. The device has the advantages of multi-degree-of-freedom vibration isolation, compact structure, lightweight design, independent control, high stability and the like, and has important application value in the fields of space reflecting mirrors, micro-nano manufacturing equipment vibration control and multi-degree-of-freedom vibration isolation systems.

The invention discloses a sandwich type piezoelectric driving double-shaft output mobile robot and a working method thereof.The sandwich type piezoelectric driving double-shaft output mobile robot comprises a sandwich type piezoelectric transducer, a pre-pressure applying mechanism, a driving wheel unit, a first output shaft, a second output shaft, a base body frame and a connecting plate, and a clamping mechanism is not arranged on a stator base body of the sandwich type piezoelectric transducer; a single pin of the pre-pressure applying mechanism and a through hole in the middle of a stator node beam are used for restraining, automatic rolling transmission of contact force is achieved under the condition of matching of the pin hole, and pre-pressure transmitted by the pre-pressure applying mechanism achieves force balance under the counter-acting force generated when a first driving foot and a second driving foot of the sandwich type piezoelectric transducer make contact with the curved surface of an output shaft. The elliptical motion trail direction of the stator driving foot can be controlled by controlling the electric signal phase difference of the longitudinal vibration piezoelectric ceramic set and the bending vibration piezoelectric ceramic set, forward and reverse motion of the first output shaft and the second output shaft is achieved through friction contact, and the mobile robot achieves forward, backward and rapid locking motion.

The invention provides a resonance type compliant cavity composite structure pressure-resistant bending disc transducer which comprises a simply-supported ring, composite pressure-resistant assemblies are symmetrically arranged on the simply-supported ring up and down, the composite pressure-resistant assemblies and the simply-supported ring form an air cavity, and each composite pressure-resistant assembly comprises a watertight layer, a piezoelectric ceramic piece, a metal bending disc and a resonance type compliant pressure-resistant shell. The shell is arranged in the simply-supported ring, the metal bent disc is arranged above the shell, a medium cavity is formed between the shell and the metal bent disc, water permeable holes are formed in the side wall of the medium cavity, and the exterior of the transducer is communicated with the medium cavity. And a watertight layer covers the outer side. According to the composite shell structure, a pressure bearing structure and a driving structure are designed separately, pressure balance between driving force and a driving element is achieved through a coupling medium, and the anti-pressure capacity is improved; the shell is a bending vibration shell with the working frequency consistent with that of the transducer, the driving impedance is low, and the static pressure resistance is high.

The invention provides an ultrasonic transducer and ultrasonic cleaning equipment, the ultrasonic transducer comprises a piezoelectric exciter and a vibration radiant panel, the vibration radiant panel is fixed on the piezoelectric exciter, a power supply is electrically connected with the piezoelectric exciter, so that the piezoelectric exciter can generate longitudinal vibration, and the longitudinal vibration of the piezoelectric exciter can excite bending vibration of the vibration radiant panel. The longitudinal vibration sandwich type piezoelectric ultrasonic transducer solves the defects that an existing longitudinal vibration sandwich type piezoelectric ultrasonic transducer is small in radiation area, weak in longitudinal displacement amplitude, long in longitudinal size and the like to a great extent, and has the advantages of being small in space needed by operation, large in sound radiation area and sound radiation power, small in size and the like. The ultrasonic transducer can be widely applied to the application requirements of miniaturization and thinning of the installation space of the ultrasonic transducer. Meanwhile, the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer can be influenced by the length, and / or the width and / or the thickness of the vibration radiant panel, so that the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer is further improved through the size of the vibration radiant panel.

The invention provides a multi-dimensional vibration platform with oppositely-arranged double-sandwich piezoelectric actuators and an excitation method of the multi-dimensional vibration platform, and belongs to the technical field of high-frequency vibration engineering and micro-nano machining.The vibration platform comprises a center platform, the two oppositely-arranged piezoelectric actuators, two end covers and two bolts, wherein the center platform is integrated with the tail end platform, the two flexible hinges and the two amplitude-change poles, and the center platform is slender and is in mirror symmetry about the longitudinal symmetry plane of the tail end platform. The piezoelectric actuator comprises a longitudinal vibration ceramic group, a bending vibration ceramic group around the Y axis and a bending vibration ceramic group around the Z axis, translation along the X / Y / Z axis and rotation around the Y / Z axis can be realized through in-phase or anti-phase excitation different combinations under the condition of not increasing extra driving channels, and five-degree-of-freedom high-frequency micro-vibration output can be achieved at most. The structure has high symmetry, low parasitic vibration, compact size and high integration, and is suitable for precise engineering scenes such as micro-nano processing, laser-assisted manufacturing, cell manipulation and active vibration suppression.

The invention discloses a magnetostrictive ultrasonic longitudinal-bending dual-mode cutting device and an operation method, the longitudinal-bending dual-mode cutting device is provided with a longitudinal-bending dual-mode main body, the front end of the longitudinal-bending dual-mode main body is provided with a stepped-shaft-shaped tool apron, chamfers or fillets are arranged between steps, the front end of the stepped-shaft-shaped tool apron is provided with a tool mounting part, and the front end of the stepped-shaft-shaped tool apron is provided with a tool holder; a threaded connection hole is formed in the cutter mounting head part, and the cutter is matched with the threaded connection hole and is fixed on the cutter mounting head part through a cutter fixing bolt. Free switching between the longitudinal vibration mode and the bending vibration mode of the machining device can be achieved by adjusting the direct current of the bias coil at the bias coil rack according to the working condition and the machining requirement of a workpiece, and the precision of the machined surface and the flexibility of a machining tool are improved.

The application discloses a patch type ultrasonic motor vibrator, a method and an ultrasonic motor of composite vibration, which comprises a vibrating body and a PZT plate group; the PZT plate group comprises a torsional PZT plate and a bending PZT plate; the top of the vibrating body is provided with a driving leg; the top surface and the bottom surface of the vibrating body are provided with the torsional PZT plates, the torsional PZT plates are polarized along the thickness direction of the vibrating body, and the polarization directions of two adjacent torsional PZT plates are opposite; the bending PZT plates are arranged at the nodes corresponding to the bending vibration on the two sides of the vibrating body, and the polarization directions of the bending PZT plates are the same. The four-foot vibrating body of the torsional / bending composite vibration type is designed, and the torsional excitation mode of the'reverse polarization and synchronous excitation' is designed, so that the electromechanical coupling degree of the linear ultrasonic motor is improved, and the problems of small driving force and low mechanical output caused by the vibration mode of the traditional vibrator are solved.

The application provides a tension-compression-bending vibration fatigue and force-position characteristic integrated testing device and system of a micro elastic element, and belongs to the technical field of micro elastic element testing. The device and system solve the problems of single function of the existing elastic element testing equipment, dependence of vibration fatigue testing and force-position characteristic testing on independent professional systems, and difficulty in adapting to millimeter-level micro elastic elements and difficulty in realizing multi-dimensional deformation loading. The device and system comprise a Y-direction displacement platform fixed on a base, an X-direction displacement platform provided with an adapter platform between the Y-direction displacement platform, a force sensor provided on the base along an axis parallel to the Y-direction displacement platform and connected with a displacement amplification mechanism, and a vibration exciter fixed on the base and connected with the displacement amplification mechanism. One end of a test spring is connected to the X-direction displacement platform, and the other end of the test spring is provided with two stations. A first station is connected with the force sensor, a second station is connected with the displacement amplification mechanism, and a laser displacement sensor detects the displacement of the displacement amplification mechanism.

The utility model relates to carbon tape processing technical field, and disclose a kind of carbon tape base ink dip-dyeing device, including dip-dyeing box, the left and right ends of dip-dyeing box are respectively provided with input and output for carbon tape base to pass in, and the inner bottom side of dip-dyeing box is provided with abutting roller, and the upper portion of dip-dyeing box is provided with bending vibration subassembly corresponding abutting roller;The bending vibration subassembly includes the cross frame being arranged on the top of dip-dyeing box.This carbon tape base ink dip-dyeing device, carbon tape base enters dip-dyeing box inside under the conveying effect of external conveying mechanism, when carbon tape passes through dip-dyeing box, utilize hydraulic rod elongation to drive link plate and press frame to move down, and carbon tape base is abutted and bent between abutting roller and press roller, utilize bending effect to extend dip-dyeing path and time, and utilize exciter to drive press frame and press roller vibration, vibration rolling is carried out to carbon tape base, to further shake out the fine bubble adhered to the surface of carbon tape base, improve the contact effect of ink and carbon tape base, to further improve dip-dyeing quality.

The invention discloses a dynamic supporting lead screw device and a working method thereof, and belongs to the field of lead screw equipment. According to the technical scheme, the dynamic supporting lead screw device comprises a main lead screw and a plurality of sets of auxiliary lead screws, a supporting assembly is installed on a nut base of each auxiliary lead screw, and the supporting assemblies are supported on the lower portion of the peripheral face of the main lead screw; a detection mechanism is arranged on the main lead screw, and the detection mechanism can detect deformation data of the main lead screw in real time; the device further comprises a control module, the control module is electrically connected with the detection mechanism and the multiple sets of auxiliary lead screws, and the control module can receive main lead screw deformation data detected by the detection mechanism and control the auxiliary lead screws to enable the supporting assembly to move to a proper position. The control module drives the auxiliary lead screw to dynamically adjust the position of the supporting assembly, real-time matching of the supporting point position, lead screw deformation and load distribution is achieved, the defect that a traditional fixed support cannot be matched with dynamic loads is thoroughly overcome, the operation stability and positioning precision of the main lead screw are remarkably improved, and bending vibration and droop deformation are effectively restrained.

A resonance device includes: a resonator and a first substrate. The resonator includes a vibration part, a frame disposed at at least a portion of a circumference of the vibration part, and a supporting arm configured to connect the vibration part and the frame. The first substrate includes a first bottom plate configured to have a first gap to the vibration part in a thickness direction. The vibration part includes a vibration arm configured to perform out-of-plane bending vibration. The vibration arm includes a tip-end part with a base-end-side portion and a tip-end-side portion that is closer to an open-end side of the vibration arm than the base-end-side portion, the base-end-side portion has a first surface that includes a metal film facing the first bottom plate, the tip-end-side portion has a second surface that includes silicon facing the first bottom plate.

A first amplitude-change pole body and a second amplitude-change pole body are coaxially arranged, the projection of the second amplitude-change pole body along the central axis of the second amplitude-change pole body is located in the first amplitude-change pole body, and a containing cavity is formed in the end, away from the first amplitude-change pole body, of the second amplitude-change pole body. The positioning rod body is arranged at the end, away from the second amplitude-change rod body, of the first amplitude-change rod body and is coaxial with the first amplitude-change rod body, the flange structure is arranged on the side wall of the first amplitude-change rod body, and a gap is formed between the flange structure and the side wall of the second amplitude-change rod body. The adjusting block extends into the gap, at least part of the adjusting block is connected to the end, close to the second amplitude-change pole body, of the first amplitude-change pole body, and the adjusting block abuts against part of the side wall of the second amplitude-change pole body. The adjusting block can enable vibration to act on the second amplitude-change pole body to enable the second amplitude-change pole body to achieve polarization, the bending vibration effect is achieved through the combined action of longitudinal vibration and polarization, and motion of a cutter is better facilitated.

The invention relates to a bending disc transducer utilizing deformation in the ceramic thickness direction. The bending disc transducer comprises a disc-shaped inner supporting plate. The piezoelectric ceramic stacks are uniformly arranged at intervals in the circumferential direction of the internal supporting plate and are fixed on the outer side of the internal supporting plate; wherein the polarization direction of the piezoelectric ceramic stack is consistent with the thickness direction of the piezoelectric ceramic stack. A driving mode is creatively changed, and the disc is driven to generate bending vibration by telescopic vibration of the piezoelectric ceramic stack in the thickness direction, so that the ceramic stack mainly bears compressive stress instead of tensile stress under the action of hydrostatic pressure, and the characteristic of high compressive strength of a ceramic material is fully utilized; and the hydrostatic pressure resistance of the bending disc transducer is improved in a breakthrough manner.

To provide a technology that can achieve an improvement in the characteristics of a pump configured to pump a fluid by bending vibration of a plate-shaped piezoelectric actuator and downsizing of the pump. A pump structure according to an aspect of the present disclosure includes an actuator capable of bending vibration, a fixing portion disposed to surround the actuator, and a support portion disposed integrally with the fixing portion and the actuator to connect the fixing portion and the actuator, the support portion supporting the actuator to enable the bending vibration with respect to the fixing portion. The actuator and the fixing portion are not similar in shape. The support portion includes a folded portion at which the support portion can be overlapped along the outer shape of the actuator.

The double-phase control multi-vibration type multifunctional ultrasonic tool bit comprises a tool handle, a vibration structure and a tool bit assembly which are installed in a matched mode, the tool handle is provided with a first inner cavity, and the vibration structure comprises a transducer assembly arranged in the first inner cavity and a magnetic core assembly arranged on the outer side of the tool handle in a sleeving mode. The transducer assembly comprises a locking screw, a rear pressing plate, bending vibration piezoelectric ceramics, longitudinal vibration piezoelectric ceramics and an amplitude-change pole, the locking screw is connected with the amplitude-change pole in a matched mode, and the rear pressing plate and the amplitude-change pole press and fix the bending vibration piezoelectric ceramics and the longitudinal vibration piezoelectric ceramics. According to the invention, the bending vibration piezoelectric ceramic can be independently driven, plane grinding, better chip removal and surface quality can be realized, the longitudinal vibration piezoelectric ceramic can be independently driven, punching is carried out in a pure longitudinal vibration mode, the bending vibration piezoelectric ceramic and the longitudinal vibration piezoelectric ceramic can be simultaneously driven, an elliptical vibration track is generated at the point of the cutter, better surface scraping is realized, and the surface quality is improved. Different vibration modes of the amplitude-change pole are realized by controlling the piezoelectric wafers with different vibration modes.

A resonance device is provided that includes a resonator including a base, a plurality of vibration arms having arms on a fixed end side connected to the base and weight portions on an open end side. A frame is around a periphery of the vibration arms and holds the base. The vibration arms extending parallel to each other and vibrating in an out-of-plane bending vibration mode as a main vibration. A lower cover and an upper form a vibration space for the resonator. A protrusion protrudes into the vibration space from an inner surface of the lower or upper cover. The frame has projections formed in positions facing the weight portions in a plan view.

The utility model relates to an ultrasonic turning tool and ultrasonic machining equipment thereof. The ultrasonic turning tool comprises a tool, an amplitude-change pole and a transducer which are sequentially connected from the tip end to the near end, the transducer comprises a plurality of piezoelectric ceramic components and a plurality of electrode plates which are arranged in the longitudinal direction of the transducer, and the piezoelectric ceramic components correspond to the electrode plates in a one-to-one mode. Wherein the plurality of piezoelectric ceramic components and the excitation power supply at least comprise two groups of the following elements: the first group is configured in a way that the first piezoelectric ceramic component drives the amplitude-change pole to do linear motion along the longitudinal direction under the excitation of the corresponding excitation end on the excitation power supply; the second group is configured to enable the amplitude-change pole to perform bending vibration in the longitudinal direction through the second piezoelectric ceramic component; the third group is configured in a way that the third piezoelectric ceramic component promotes the amplitude-change pole to perform torsional motion in the longitudinal direction; the phase difference of any two of the first phase, the second phase and the third phase ranges from 0 degree to 180 degrees. The ultrasonic machining equipment comprises the ultrasonic turning tool.

The application provides a piezoresistive sound pressure gradient hydrophone, which comprises two ceramic substrate printed circuit boards in the shape of a disc, four piezoresistive strain gauges, a base and a sound insulation barrier, the piezoresistive strain gauges are welded on the ceramic substrate printed circuit boards in the shape of a disc, the edges of the ceramic substrate printed circuit boards in the shape of a disc are supported on the base, a bending disc type vibration system with edges simply supported and a middle free is formed, the bending disc type vibration system does forced bending vibration under the action of underwater sound waves, the piezoresistive strain gauges welded thereon are extruded and stretched, and thus impedance change occurs; the ceramic substrate printed circuit boards simultaneously play a signal conditioning role, and the impedance change of the piezoresistive strain gauges is converted into voltage change through a Wheatstone bridge type circuit structure; the sound insulation barrier isolates the two ceramic substrate printed circuit boards in the shape of a disc, a sound path difference is formed, and the signals of the two ceramic substrate printed circuit boards are subtracted to obtain a sound pressure gradient signal. The application has the advantages that machine and electric integration is realized, and miniaturization is realized.

The present application relates to a kind of surface adsorbed lunar dust ultrasonic removal system and method, wherein the system includes by the controller of electric connection, ultrasonic power supply and ultrasonic transducer, the ultrasonic transducer is installed on the component to be dusted, when dusting, the excitation electric signal generated by the controller, through the ultrasonic power supply amplification, excitation ultrasonic transducer generates vibration;The longitudinal vibration of the ultrasonic transducer is coupled by longitudinal bending, so that the component to be dusted generates bending vibration, the lunar dust particles adsorbed on the surface of the component to be dusted obtain sufficient vibration energy, overcome adsorption potential energy, separate from the surface of the component to be dusted.

The invention discloses a piezoelectric-driven amphibious extraterrestrial planet surveying robot and a working method thereof, the whole robot adopts a differential-driven three-wheel layout structure, and double piezoelectric driving feet arranged on the two sides of the front end drive an end paddle impeller to drive a tail end driven paddle impeller to move. The piezoelectric driving feet are fixed on the metal vehicle body through bolts, a driving controller is arranged in the metal vehicle body, buoyancy adjusting devices are arranged on two sides of the metal vehicle body, and the tail of the metal vehicle body is connected with a driven paddle wheel through a driven wheel adjusting rod. The piezoelectric driving foot part comprises a pre-tightening force bolt, a fixing flange, a piezoelectric ceramic set, a metal front end, a double-end stud, a double-bearing rotor, a rotor pre-compression spring and a locknut. According to the piezoelectric driving foot, the bending vibration mode of the cantilever beam type stator is stimulated, and the free end vibration is used for driving the double-bearing rotor to drive the driving end paddle impeller to rotate. According to the invention, the integrated design of structure and function is realized, the structure is simple, and microminiaturization is easy. The piezoelectric driving mode is adopted for underwater operation, dynamic sealing is not needed, the pressure resistance is good, and high application value and good economic benefits are achieved in the field of extraterrestrial planet exploration.

The utility model discloses a kind of V-shaped blade milling cutter and tool, it includes: V-shaped blade milling cutter includes positive mounting surface, bottom mounting surface and four side connecting surfaces, positive mounting surface and bottom mounting surface are oppositely arranged, four side connecting surfaces are sequentially connected and complete closure, positive mounting surface and bottom mounting surface are connected with the two sides of four side connecting surfaces respectively, the connecting place of each side connecting surface with positive mounting surface respectively, and the connecting place of bottom mounting surface are all formed with cutting edge, cutting edge is arranged in V type. Four cutting edges switch into eight cutting edges, and V-shaped structure can also split wide chip into smaller part, reduce cutting force fluctuation and chip removal resistance, change the direction and distribution of cutting force, reduce the radial force component causing tool bending vibration, avoid all blades to reach maximum cutting force peak value simultaneously, with similar uneven tooth pitch vibration damping effect, thereby more adapt to long overhang application scenario.

The invention discloses a multi-dimensional vibration platform with double sandwich type piezoelectric actuators arranged in the same direction and an excitation method of the multi-dimensional vibration platform, and relates to the field of high-frequency vibration engineering and micro-nano machining. Aiming at the problem that a traditional piezoelectric vibration platform is difficult to realize higher-dimension multi-degree-of-freedom operation capability, the piezoelectric vibration platform comprises an output platform, two piezoelectric actuators, two end covers and two bolts. The piezoelectric actuator is provided with a longitudinal vibration ceramic set and two bending vibration ceramic sets arranged in the orthogonal direction, and through excitation of voltage signals with the same phase or the phase difference of 180 degrees, rotation around the X axis, the Y axis and the Z axis and translation along the X axis and the Y axis are achieved. Due to structural symmetry and driver arrangement constraint, Z-direction translation is strongly coupled with an existing mode, so that high-practicability five-degree-of-freedom output is focused. The same-direction arrangement type design is adopted, the characteristic of low motion coupling is achieved, and displacement deformation of the piezoelectric actuator can be converted into different actions needed by multi-dimensional vibration of the tail end platform. The method is suitable for the fields of laser processing, vibration-assisted processing, micro-nano operation, active vibration suppression and the like.

The invention provides a double-excitation three-dimensional ultrasonic vibration cutting device with a single-phase vibration multi-stage amplification function. The device comprises an ultrasonic vibrator A, an ultrasonic vibrator B, a special-shaped amplitude-change pole, a conical amplitude-change pole and a cutter, the special-shaped amplitude-change pole converts and decomposes longitudinal ultrasonic vibration generated by the ultrasonic vibrator A into ultrasonic bending vibration and longitudinal vibration; the ultrasonic vibrator B and the conical amplitude-change pole form a vibration unit B which is arranged in the radial direction of the special-shaped amplitude-change pole to excite the other phase of bending vibration of the three-dimensional ultrasonic vibration device, and bending ultrasonic vibration and longitudinal ultrasonic vibration generated by the vibration unit A are combined to form a three-dimensional ultrasonic vibration track synthesized by bending vibration, longitudinal vibration and bending vibration. The tool is installed at the output end of the special-shaped amplitude-change pole and outputs a three-dimensional ultrasonic vibration elliptical track. Firstly, dependence on a three-channel ultrasonic power supply is avoided, secondly, the problem that the coupling effect of various kinds of vibration is poor due to sudden change of material performance in the ultrasonic propagation process is avoided to a great extent, and finally, the single-phase vibration multi-stage amplification function is designed in the cutting direction. The theoretical cutting speed limit of ultrasonic vibration intermittent cutting is remarkably improved, and the problem that the ultrasonic vibration intermittent cutting machining efficiency is low is greatly solved.

The application discloses a piezoelectric stack driven feeding device and a working method thereof. The feeding device comprises a base, a top plate, first to fourth spring sheets, first and second connecting members, first and second driving modules, first and second fixing seats, a feeding plate and a pneumatic module. The first and second driving modules are the same in structure and each comprises a base body, a piezoelectric stack, a pre-tightening bolt, a first flexible hinge, a second flexible hinge, a first connecting block and a second connecting block. In operation, the piezoelectric stacks of the first and second driving modules apply the same bias alternating current signals, generate periodic deformation and excite the bending vibration of the first to fourth spring sheets; the third and fourth spring sheets drive the top plate and the guide rail to make a composite movement in the horizontal direction and the vertical direction, drive the material on the guide rail to make a linear movement by using the inertia and friction principle, and realize the conveying of the material.

The application relates to a three-dimensional combined shock insulation support for bending vibration control, which comprises a combined shock insulation support distributed lower support plate, a combined shock insulation support upper support plate, vertical shock insulation elements and horizontal shock insulation elements arranged between the combined shock insulation support distributed lower support plate and the combined shock insulation support upper support plate; the vertical shock insulation elements are connected with the combined shock insulation support upper support plate through slidable connecting pieces, and a preset movable space is formed between the slidable connecting pieces and the combined shock insulation support upper support plate, three-dimensional shock insulation in the bending vibration process is realized under the cooperation of the horizontal shock insulation elements, and structural inclination and displacement caused by insufficient vertical rigidity are avoided. Compared with the prior art, the three-dimensional combined shock insulation support can have strong vertical bearing capacity, realize three-dimensional shock insulation and limit displacement, and has excellent shock insulation effect for vertical shock insulation of a structure with large self weight.

The invention discloses a longitudinal-bending composite ultrasonic vibration auxiliary polishing device which overcomes the defects that a traditional ultrasonic vibration auxiliary polishing device cannot adjust the bending vibration track and limits the process optimization range, and the bending vibration track can be directly changed by adjusting the phase difference of a power supply. Therefore, the overall ultrasonic vibration track of the polishing head is changed under the condition that the transducer is not replaced, a larger technological parameter adjusting range can be obtained in the technological development process, and the machining efficiency and the machining precision are optimized. The auxiliary device is used for generating longitudinal-bending composite ultrasonic vibration with an adjustable movement track during polishing of an optical element, and has the advantages of being simple in structure, convenient to use, low in cost and the like.