CN203874980U - Low-loss ultrasonic machining transducer - Google Patents
Low-loss ultrasonic machining transducer Download PDFInfo
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- CN203874980U CN203874980U CN201420257514.0U CN201420257514U CN203874980U CN 203874980 U CN203874980 U CN 203874980U CN 201420257514 U CN201420257514 U CN 201420257514U CN 203874980 U CN203874980 U CN 203874980U
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- ultrasonic transformer
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Abstract
The utility model discloses a low-loss ultrasonic machining transducer comprising a rear cover plate, a PZT (Pb-based zirconate titanate) chip, a front cover plate and a variable amplitude bar. A mounting link portion is arranged at the tail end of the variable amplitude bar. The front and rear end faces of the mounting link portion are provided with a lower groove and an upper groove, respectively, and namely, a Z-shaped structure is formed. The low-loss ultrasonic machining transducer is ingenious and reasonable in structural design, the cross section of the mounting link portion is Z shaped, the mounting link portion can be well combined with the outside of a machine, combining effect is good, ultrasonic energy is effectively prevented from diffusing, the ultrasonic energy can be effectively transmitted to material to be machined, a transmission path of the ultrasonic energy is guaranteed, transmission efficiency of the ultrasonic energy is greatly increased, rotating performance of a spindle of the machine can also be ensured, machining effect is guaranteed accordingly, the transducer is applicable to effective machining of hard and brittle materials, such as sapphire, ferrite and zirconia, and the transducer is good in operational stability, long in service life and easy to widely apply and use.
Description
Technical field
The utility model relates to transducer technology field, particularly a kind of low-loss Ultrasonic machining transducer.
Background technology
More current special material application are more and more extensive, such as glass, sapphire, carborundum, composite etc.These materials, because mechanical property is very firmly crisp, cause adopting traditional processing technology cannot meet the requirement of the machining accuracy of these materials.Current industry has adopted the auxiliary mode of ultrasonic energy, in conjunction with the High Rotation Speed of existing lathe, for machinability, the machining accuracy of this class hard brittle material and the life-span of improving process tool.In ultrasonic secondary process, ultrasonic energy is the most key parameter of processing technology, and it plays excitation material atomic energy, reduces the effects such as cutting force.Transducer (Transducer) is the core executing agency that ultrasonic energy is provided in Ultrasonic machining, and its operation principle is vibrated for utilizing piezoelectric inverse effect that electrical signal of the frequency is converted to high frequency ultrasound, and ultrasonic energy is transferred to rapidoprint.The carrier that transducer transmits as ultrasonic energy, its service behaviour directly affects surface accuracy, working (machining) efficiency, the cutter life of rapidoprint.For guaranteeing machining accuracy and the efficiency of material, need accurately to control ultrasonic energy transmission and the vibration mode of transducer.
In addition, on machine tool chief axis, increase ultrasonic wave module, if the vibration characteristics of transducer be mustn't go to effective control, will have influence on the main shaft of lathe, especially can have influence on the bearing of main shaft, will the revolving property of main shaft and life-span be produced to negative effect.
Utility model content
For above-mentioned deficiency, the purpose of this utility model is, provides a kind of structural design ingenious, reasonable, can guarantee that ultrasonic vibrational energy, effectively to the transmission of bistrique instrument, effectively promotes the low-loss Ultrasonic machining transducer of processing effect and long service life.
The technical scheme that the utility model adopted is for achieving the above object: a kind of low-loss Ultrasonic machining transducer, it comprises back shroud, PZT wafer, front shroud and ultrasonic transformer, the front end of described ultrasonic transformer is and dwindles gradually shape, and end face is provided with for the pilot hole of bistrique instrument is installed, the tail end lateral surface radial protrusion of this ultrasonic transformer forms one connection part is installed, this installation connection part is provided with low groove towards one end of described pilot hole basifacial, top, other end is provided with upper groove, be that integral body is zigzag structure, described back shroud, PZT wafer and front shroud are stacked successively, and by attaching parts, be arranged on the tail end of described ultrasonic transformer.
As further improvement of the utility model, described back shroud, PZT wafer, front shroud and ultrasonic transformer are all concentric with benchmark axle center.Reduce the impact of non axial vibration, to guarantee to do single axially-movable, not only greatly improve ultrasonic energy transmission efficiency, guarantee crudy, and revolving property that can lifting spindle and extend its service life.
As further improvement of the utility model, the length of described back shroud is 2～6mm.The length of described PZT wafer is 1～5mm.The length of described ultrasonic transformer is 20～50mm, and described front shroud length is 10～12mm.Reasonable in design, fiting effect is good.
As further improvement of the utility model, the outer surface of described back shroud, PZT wafer, front shroud and ultrasonic transformer is matsurface, can effectively reduce the loss of ultrasonic energy and the generation of parasitic mode.
The beneficial effects of the utility model are: structural design of the present utility model is ingenious, rationally, the cross-sectional profiles that connection part is installed is zigzag, can combine with machine exterior preferably, and in conjunction with effective, effectively avoided ultrasonic energy to external diffusion, guaranteed that ultrasonic energy is effectively delivered to machined material, thereby guarantee the bang path of ultrasonic energy, not only greatly promote ultrasonic energy transmission efficiency, and can guarantee again the verticity of machine tool chief axis, and then assurance processing effect, in addition, overall structure of the present utility model is simple, compact, good operating stability, long service life, be easy to extensively promote the use of, can be to sapphire, ferrite, the hard brittle materials such as zirconia are effectively processed.
Below in conjunction with accompanying drawing and embodiment, the utility model is further illustrated.
Accompanying drawing explanation
Fig. 1 is perspective view one of the present utility model.
Fig. 2 is perspective view two of the present utility model.
Fig. 3 is the sectional structure schematic diagram of ultrasonic transformer in the utility model.
The specific embodiment
Embodiment: see Fig. 1, Fig. 2 and Fig. 3, a kind of low-loss Ultrasonic machining transducer that the utility model provides, it comprises back shroud 1, PZT wafer 2, front shroud 3 and ultrasonic transformer 4, the front end of described ultrasonic transformer 4 is and dwindles gradually shape, and end face is provided with for the pilot hole of bistrique instrument 5 is installed, the tail end lateral surface radial protrusion of this ultrasonic transformer 4 forms one connection part 41 is installed, referring to Fig. 3, this installation connection part 41 is provided with low groove 42 towards one end of described pilot hole basifacial, top, other end is provided with upper groove 43, be that integral body is zigzag structure, described back shroud 1, PZT wafer 2 and front shroud 3 are stacked successively, and by attaching parts 6, be arranged on the tail end of described ultrasonic transformer 4.Concrete, described attaching parts 6 are screw, and this screw comprises head 61 and the bar portion 62 being connected with this head 61, and described back shroud 1, PZT wafer 2 and protecgulum are run through successively in this bar portion 62, and screw in the breech face of described ultrasonic transformer 4.Wherein the breech face of protecgulum and described ultrasonic transformer 4 fits.
Bistrique instrument 5 is plugged on the pilot hole of ultrasonic transformer 4, and is fixedly connected by pressure cap 7 and ultrasonic transformer 4.PZT wafer 2 is connected with drive unit; When the described drive unit tranmitting frequency signal of telecommunication produces ultrasonic vibration, in the present embodiment, when the described drive unit tranmitting frequency signal of telecommunication produces ultrasonic vibration frequency, this ultrasonic vibration calibration is 20-60KHz, the drive unit tranmitting frequency signal of telecommunication produces ultrasonic vibration, drives described ultrasonic transformer 4 work, thereby drives described bistrique instrument 5 work, thereby ultrasonic energy is acted on machined material, realize the object of processing.
About the selection of piezoelectric and ultrasonic transformer 4 materials, in order to reduce the impact of non axial vibration, improve efficient ultrasonic energy transmission efficiency, piezoelectric selects to have the thickness electromechanical coupling coefficient K of the high order of magnitude
1, the dielectric constant K of the low order of magnitude
33 t, the radially electromechanical coupling factor K of the low order of magnitude
31pZT wafer 2.For ultrasonic transformer 4, select to have stainless steel or the titanium alloy material of low-yield dissipation.
The size design of described PZT wafer 2, described front shroud 3 and described back shroud 1 is followed following formula:
wherein, k
s, k
b, k
ffor wave number;
,
and
for the acoustic impedance of ultrasonic wave at front shroud 3, back shroud 1 and PZT wafer 2.
The length of described back shroud 1 is 2～6mm; The length of described PZT wafer 2 is 1～5mm; Preferably, in the present embodiment, the length of described back shroud 1 is 3mm, and the length of described PZT wafer 2 is 3mm.
Between described front shroud 3 and described ultrasonic transformer 4, be provided with retainer ring, described front shroud 3 length are 10～12mm.
The size design of described ultrasonic transformer 4 is followed following formula:
wherein, k' and k are the wave number of transducing bar and mounting portion; δ 1, and δ 2, and δ 3 and δ 4 are the proportionality constant of system rod member; L is each level length of project organization.
The length of described ultrasonic transformer 4 is 20～50mm; Described back shroud 1, PZT wafer 2, front shroud 3 and ultrasonic transformer 4 are all concentric with benchmark axle center, and the center of each parts is all on same straight line.Described in during assembling, PZT wafer 2 need to reach 0.04 with the axiality of described ultrasonic transformer 4, to guarantee that system does single axially-movable.
In the present embodiment, preferably, the outer surface of described back shroud 1, PZT wafer 2, front shroud 3 and ultrasonic transformer 4 is matsurface, the roughness of wherein said back shroud 1, PZT wafer 2 and front shroud 3 is 0.4 μ m, the roughness on described ultrasonic transformer 4 surfaces is 0.8 μ m, can reduce as much as possible the loss of ultrasonic energy and the generation of parasitic mode like this.
During use, because the installation connection part 41 of this low-loss Ultrasonic machining transducer is provided with low groove 42 and upper groove 43, cross-sectional profiles is zigzag, can combine with machine exterior preferably, and in conjunction with effective, the outside transmission of ultrasonic energy effectively, thereby the bang path that guarantees ultrasonic energy, not only greatly promotes ultrasonic energy transmission efficiency, and can guarantee again the verticity of machine tool chief axis, and then assurance processing effect, there is good service behaviour.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change and revise above-mentioned embodiment.Therefore, the utility model is not limited to the specific embodiment disclosed and described above, to modifications and changes more of the present utility model, also should fall in the protection domain of claim of the present utility model.In addition,, although used some specific terms in this description, these terms just for convenience of description, do not form any restriction to the utility model, adopt other transducer same or analogous with it, all in the utility model protection domain.
Claims (8)
1. a low-loss Ultrasonic machining transducer, it is characterized in that: it comprises front shroud, back shroud, PZT wafer and ultrasonic transformer, the front end of described ultrasonic transformer is and dwindles gradually shape, and end face is provided with for the pilot hole of bistrique instrument is installed, the tail end lateral surface radial protrusion of this ultrasonic transformer forms one connection part is installed, this installation connection part is provided with low groove towards one end of described pilot hole basifacial, top, other end is provided with upper groove, described back shroud, PZT wafer and front shroud are stacked successively, and by attaching parts, are arranged on the tail end of described ultrasonic transformer.
2. low-loss Ultrasonic machining transducer according to claim 1, is characterized in that, described back shroud, PZT wafer, front shroud and ultrasonic transformer are all concentric with benchmark axle center.
3. low-loss Ultrasonic machining transducer according to claim 1 and 2, is characterized in that, the length of described back shroud is 2～6mm.
4. low-loss Ultrasonic machining transducer according to claim 1 and 2, is characterized in that, the length of described PZT wafer is 1～5mm.
5. low-loss Ultrasonic machining transducer according to claim 1 and 2, is characterized in that, the length of described ultrasonic transformer is 20～50mm.
6. low-loss Ultrasonic machining transducer according to claim 1 and 2, is characterized in that, described front shroud length is 10～12mm.
7. low-loss Ultrasonic machining transducer according to claim 1, is characterized in that, the outer surface of described back shroud, PZT wafer, front shroud and ultrasonic transformer is matsurface.
8. low-loss Ultrasonic machining transducer according to claim 1, it is characterized in that, described attaching parts are screw, and this screw comprises head and the bar portion being connected with this head, described back shroud, PZT wafer and protecgulum are run through successively in this bar portion, and screw in the breech face of described ultrasonic transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257514.0U CN203874980U (en) | 2014-05-20 | 2014-05-20 | Low-loss ultrasonic machining transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257514.0U CN203874980U (en) | 2014-05-20 | 2014-05-20 | Low-loss ultrasonic machining transducer |
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| CN203874980U true CN203874980U (en) | 2014-10-15 |
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| CN201420257514.0U Active CN203874980U (en) | 2014-05-20 | 2014-05-20 | Low-loss ultrasonic machining transducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475318A (en) * | 2014-11-19 | 2015-04-01 | 东莞市优超精密技术有限公司 | Low-impedance ultrasonic machining energy converter |
| CN106994628A (en) * | 2017-04-20 | 2017-08-01 | 嘉泰数控科技股份公司 | The shaping methods of thin-walled zirconium oxide workpiece |
| CN107442390A (en) * | 2017-08-15 | 2017-12-08 | 浙江工商大学 | A kind of new type ultrasonic amplitude rod devices |
| CN109351581A (en) * | 2018-11-16 | 2019-02-19 | 广州汇专工具有限公司 | It is a kind of to have the function of vibration isolation, the flanged structure energy converter for ultrasonic unit |
| CN111542403A (en) * | 2017-11-10 | 2020-08-14 | 超声超音波有限公司 | Ultrasonic transducer |
-
2014
- 2014-05-20 CN CN201420257514.0U patent/CN203874980U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475318A (en) * | 2014-11-19 | 2015-04-01 | 东莞市优超精密技术有限公司 | Low-impedance ultrasonic machining energy converter |
| CN106994628A (en) * | 2017-04-20 | 2017-08-01 | 嘉泰数控科技股份公司 | The shaping methods of thin-walled zirconium oxide workpiece |
| CN106994628B (en) * | 2017-04-20 | 2019-05-10 | 嘉泰数控科技股份公司 | The shaping methods of thin-walled zirconium oxide workpiece |
| CN107442390A (en) * | 2017-08-15 | 2017-12-08 | 浙江工商大学 | A kind of new type ultrasonic amplitude rod devices |
| CN111542403A (en) * | 2017-11-10 | 2020-08-14 | 超声超音波有限公司 | Ultrasonic transducer |
| CN111542403B (en) * | 2017-11-10 | 2022-08-23 | 超声超音波有限公司 | Ultrasonic transducer |
| CN109351581A (en) * | 2018-11-16 | 2019-02-19 | 广州汇专工具有限公司 | It is a kind of to have the function of vibration isolation, the flanged structure energy converter for ultrasonic unit |
| CN109351581B (en) * | 2018-11-16 | 2023-07-18 | 汇专科技集团股份有限公司 | Flange structure transducer with vibration isolation function for ultrasonic device |
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