US3564304A - Electrode configuration for tubular piezoelectric high-strain driver - Google Patents
Electrode configuration for tubular piezoelectric high-strain driver Download PDFInfo
- Publication number
- US3564304A US3564304A US859654A US3564304DA US3564304A US 3564304 A US3564304 A US 3564304A US 859654 A US859654 A US 859654A US 3564304D A US3564304D A US 3564304DA US 3564304 A US3564304 A US 3564304A
- Authority
- US
- United States
- Prior art keywords
- tube
- piezoelectric transducer
- rings
- transducer
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 241000239290 Araneae Species 0.000 claims abstract description 10
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 9
- 239000010951 brass Substances 0.000 claims abstract description 9
- 239000004593 Epoxy Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920006333 epoxy cement Polymers 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
- B06B1/0655—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element of cylindrical shape
Definitions
- ABSTRACT A cylindrical piezoelectric high-strain ultrasonic driver made up of a plurality of ceramic rings is imbedded in the interior of ELECTRODE CONFIGURATION FOR TUBULAR a steel roller which is used in a rolling mill.
- Prior art piezoelectric ultrasonic transducers were very sensitive to both excessive driving power and vibrational energy.
- the application of these prior art transducers as a vibrational source for vibrating a roller used in rolling mills for rolling metal stock into sheets has presented many problems. Primary among these has been the problem of developing a piezoelec tric transducer that has at least a reasonably long working life. Not until this invention has this problem been solved.
- An object of this invention is to provide an ultrasonic transducer for use in rolling-mill rollers that will be virtually immune to deterioration because of vibrational energy.
- Another object of this invention is to provide a vibrationimmune high-potential electrode for an ultrasonic transducer used in rolling-mill rollers that also acts to uniformly distribute the excitation Potential.
- a still further object is to provide a vibration-immune highpotential electrode that has a vibration-immune terminal for facilitating the connection of a power source to the electrode, which does not distract from the resonant efficiency of the transducer.
- FIG. I illustrates, partly in broken away section, the interior of a standard roller used in a rolling mill within which the ultrasonic transducer of this invention would be placed;
- FIG. 2 illustrates in diagrammatical form the ultrasonic transducer of this invention, including the electrode construction, placed within the roller.
- opening 14 is where the circular ceramic transducer would be placed.
- the central portion, 11 of the roller is bored out along the axis of rotation of the roller to provide the opening 14.
- end portions 12 and 13 also have openings 15 and 16 bored into them. These openings provide for cable lead-in from a power source.
- Each of the end sections have shoulder sections 23, 24 and 20, 21, respectively. Shoulder sections 24 and 21 are of a square shape so they will fit into a standard rolling mill in a drtveable fashion. Shoulders 23 and 20 are circular and have the same axis of rotation as the rest of the roller.
- the three sections of the roller; central section 11, and the two end sections 12 and 13 are kept together by a plurality of bolts 18 which are circumferentially placed about the axis of rotation of the roller.
- FIG. 2 illustrates, in a diagrammatical form, the placement of a ring piezoelectric transducer within the opening 14 of the central section 11 of a roller constructed in the manner illustrated in FIG. 1.
- Ceramic rings 27 may comprise a ceramic material of lead-zirconate-titanate. These rings are placed in a stacked manner, as shown in FIG. 2, and are epoxied into position at the ground electrode side 29, to the interior of roller 11. The rings are machined to a very close tolerance so as to provide a very close fit between them.
- the boundary between each ring such as boundary 34 is filled with an epoxy cement. Teflon spacers 26 are placed at each end of the stack so as to provide electrical insulation between the rings and the end sections.
- the high-potential side of the ceramic rings 28, is connected to the power source by means of a thin-walled brass tube, 30, which is machined to very close tolerances for intimate contact with the inside of the ring stack. It is silver epoxied into place.
- the tube 30 thus functions -as one high-potential electrode for the entire stack of ceramic rings.
- the brass sleeve facilitates uniform distribution of excitation current to all the piezoelectric ceramic rings.
- a spider 31 having legs 32 is connected to the interior side of the brass tube by means of legs 32 which are soldered to the tube by silver epoxy joints 33. The spider facilitates connection of excitation leads to the power source.
- the leads from the power source are attached to the spider at its center which is the approximate nodel point of the entire assembly when the ceramic rings are resonating in a hoop mode. It can thus be seen that besides providing a more efiicient ultrasonic transducer for this application, the brass-tube electrode in conjunction with the spider virtually eliminates high-potential electrode deterioration because of high vibrational energy generated by the transducer itself.
- a cylindrical ultrasonic piezoelectric transducer disposed within a central opening extending axially through a solid roller comprising:
- the piezoelectric transducer of claim 3 further comprising a spider soldered to the center of said tube for facilitating connection of a power source to said tube.
- the piezoelectric transducer of claim 4 further comprising an electrical cable from said power source connected to the center of said spider at the approximate nodel point of the transducer assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
A cylindrical piezoelectric high-strain ultrasonic driver made up of a plurality of ceramic rings is imbedded in the interior of a steel roller which is used in a rolling mill. Long service life is obtained from the ultrasonic piezoelectric transducer because of a close-fitting, thin-walled, brass tube epoxied into position inside the ceramic rings that make up the ultrasonic transducer. A spider facilitates connection between the brass tube and the power source.
Description
0 United States Patent 11113,564,304
[72] inventors William E. Thorn [56] References Cited Pittsburgh; UNITED STATES PATENTS Robert Whittaker, Expo", 3,315,520 4/1967 Caunevale et al. 310/s.7x 1 pp 859,654 3,390,559 7/1968 Steutzer 3 1 0/8.6X 1 Flled l 22,1969 3,069,573 12/1962 Van Liew 310/9.7x [45 Patented Feb. 16, 1971 [73] Assignee Przrnary Examiner-Mfltun O. Hlrshfield the United States of America, as Assistant Examiner-B. A. Reynolds represented by the secretary oflhe Navy Attorneys-Edgar J. Brower and Thomas 0. Watson, Jr.
ABSTRACT: A cylindrical piezoelectric high-strain ultrasonic driver made up of a plurality of ceramic rings is imbedded in the interior of ELECTRODE CONFIGURATION FOR TUBULAR a steel roller which is used in a rolling mill.
PIEZOELECTRIC HIGH- R IN DRIVER Long service life is obtained from the 5 Claims, 2 Drawing Figsultrasonic piezoelectric transducer [521 US. 01 310/82; because Ofa close-fitting thin-Walled,
310/8]; 310/95; 310/97 brass tube epoxied into position inside the ceramic rings that make up the ultrasonic [51] Int. Cl. H0lv 7/00 transducer. A spider facilitates connection [50] Field of Search 310/8.6, between the brass tube and the power 1 ELECTRODE CONFIGURATIONFOR TUBULAR PIEZOELECTRIC HIGH-STRAIN DRIVER STATEMENT OF GOVERNMENT INTEREST BACKGROUND OF THE INVENTION This invention concerns ultrasonic piezoelectric transducers used in rolling-mill rollers, and more particularly, to the improvement of ultrasonic piezoelectric transducers by modifications which expand their useful working life.
Prior art piezoelectric ultrasonic transducers were very sensitive to both excessive driving power and vibrational energy. The application of these prior art transducers as a vibrational source for vibrating a roller used in rolling mills for rolling metal stock into sheets has presented many problems. Primary among these has been the problem of developing a piezoelec tric transducer that has at least a reasonably long working life. Not until this invention has this problem been solved.
SUMMARY or THE INVENTION OBJECTS or THE INVENTION An object of this invention is to provide an ultrasonic transducer for use in rolling-mill rollers that will be virtually immune to deterioration because of vibrational energy.
Another object of this invention is to provide a vibrationimmune high-potential electrode for an ultrasonic transducer used in rolling-mill rollers that also acts to uniformly distribute the excitation Potential.
' A still further object is to provide a vibration-immune highpotential electrode that has a vibration-immune terminal for facilitating the connection of a power source to the electrode, which does not distract from the resonant efficiency of the transducer.
Other objects, advantages and novel features of the invention will become apparent from, the following detailed description of the invention when considered in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I illustrates, partly in broken away section, the interior of a standard roller used in a rolling mill within which the ultrasonic transducer of this invention would be placed; and
FIG. 2 illustrates in diagrammatical form the ultrasonic transducer of this invention, including the electrode construction, placed within the roller.
DESCRIPTION OF THE PREFERRED EMBODIMENTS A piezoelectric transducer placed within the center portion of a roller as shown in FIG. I, obviously encounters severe vibrations when it is called upon to produce displacement along the roller surface. As can be seen from FIG. 1, opening 14 is where the circular ceramic transducer would be placed. The central portion, 11 of the roller is bored out along the axis of rotation of the roller to provide the opening 14. The
FIG. 2 illustrates, in a diagrammatical form, the placement of a ring piezoelectric transducer within the opening 14 of the central section 11 of a roller constructed in the manner illustrated in FIG. 1. Ceramic rings 27 may comprise a ceramic material of lead-zirconate-titanate. These rings are placed in a stacked manner, as shown in FIG. 2, and are epoxied into position at the ground electrode side 29, to the interior of roller 11. The rings are machined to a very close tolerance so as to provide a very close fit between them. The boundary between each ring such as boundary 34 is filled with an epoxy cement. Teflon spacers 26 are placed at each end of the stack so as to provide electrical insulation between the rings and the end sections. The high-potential side of the ceramic rings 28, is connected to the power source by means of a thin-walled brass tube, 30, which is machined to very close tolerances for intimate contact with the inside of the ring stack. It is silver epoxied into place. The tube 30 thus functions -as one high-potential electrode for the entire stack of ceramic rings. Besides providing a vibration-immune electrode and terminal for the high potential side of the piezoelectric transducer, the brass sleeve facilitates uniform distribution of excitation current to all the piezoelectric ceramic rings. A spider 31 having legs 32 is connected to the interior side of the brass tube by means of legs 32 which are soldered to the tube by silver epoxy joints 33. The spider facilitates connection of excitation leads to the power source. The leads from the power source are attached to the spider at its center which is the approximate nodel point of the entire assembly when the ceramic rings are resonating in a hoop mode. It can thus be seen that besides providing a more efiicient ultrasonic transducer for this application, the brass-tube electrode in conjunction with the spider virtually eliminates high-potential electrode deterioration because of high vibrational energy generated by the transducer itself.
Obviously many modifications and variations of the present invention are possible in the light of the above teachings.
We claim:
1. A cylindrical ultrasonic piezoelectric transducer disposed within a central opening extending axially through a solid roller comprising:
a plurality of ceramic rings in intimate contact with each other bonded to said roller by an epoxy joint; and
a tube of conducting metal bonded to the inside of said plurality of rings.
2. The ultrasonic piezoelectric transducer recited in claim 1 wherein said tube of conducting metal comprises thin-walled brass, machined for intimate contact with the inside of said plurality of rings.
3. The piezoelectric transducer of claim I wherein said tube is bonded to the inside of said ceramic rings by conducting epoxy.
4. The piezoelectric transducer of claim 3, further comprising a spider soldered to the center of said tube for facilitating connection of a power source to said tube.
5. The piezoelectric transducer of claim 4 further comprising an electrical cable from said power source connected to the center of said spider at the approximate nodel point of the transducer assembly.
Claims (5)
1. A cylindrical ultrasonic piezoelectric transducer disposed within a central opening extending axially through a solid roller comprising: a plurality of ceramic rings in intimate contact with each other bonded to said roller by an epoxy joint; and a tube of conducting metal bonded to the inside of said plurality of rings.
2. The ultrasonic piezoelectric transducer recited in claim 1 wherein said tube of conducting metal comprises thin-walled brass, machined for intimate contact with the inside of said plurality of rings.
3. The piezoelectric transducer of claim 1 wherein said tube is bonded to the inside of said ceramic rings by conducting epoxy.
4. The piezoelectric transducer of claim 3, further comprising a spider soldered to the center of said tube for faciLitating connection of a power source to said tube.
5. The piezoelectric transducer of claim 4 further comprising an electrical cable from said power source connected to the center of said spider at the approximate nodel point of the transducer assembly.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85965469A | 1969-09-22 | 1969-09-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3564304A true US3564304A (en) | 1971-02-16 |
Family
ID=25331426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US859654A Expired - Lifetime US3564304A (en) | 1969-09-22 | 1969-09-22 | Electrode configuration for tubular piezoelectric high-strain driver |
Country Status (1)
Country | Link |
---|---|
US (1) | US3564304A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0251797A2 (en) * | 1986-07-02 | 1988-01-07 | Nec Corporation | Non-directional ultrasonic transducer |
US5008580A (en) * | 1988-02-03 | 1991-04-16 | Yoshida Kogyo K. K. | Piezoelectric vibration generator and vibratory parts feeder incorporating the same |
US5578888A (en) * | 1994-12-05 | 1996-11-26 | Kulicke And Soffa Investments, Inc. | Multi resonance unibody ultrasonic transducer |
US6165192A (en) * | 1999-01-05 | 2000-12-26 | Second Sight, Llc | Method and apparatus for intraocular retinal tack inserter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3069573A (en) * | 1961-06-26 | 1962-12-18 | Eugene Van Liew | Connector assembly for annular piezoelectric transducers |
US3315520A (en) * | 1964-03-10 | 1967-04-25 | Parametrics Inc | Ultrasonic measurement apparatus |
US3390559A (en) * | 1967-08-30 | 1968-07-02 | Atomic Energy Commission Usa | Piezomechanical locking mechanism |
-
1969
- 1969-09-22 US US859654A patent/US3564304A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3069573A (en) * | 1961-06-26 | 1962-12-18 | Eugene Van Liew | Connector assembly for annular piezoelectric transducers |
US3315520A (en) * | 1964-03-10 | 1967-04-25 | Parametrics Inc | Ultrasonic measurement apparatus |
US3390559A (en) * | 1967-08-30 | 1968-07-02 | Atomic Energy Commission Usa | Piezomechanical locking mechanism |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0251797A2 (en) * | 1986-07-02 | 1988-01-07 | Nec Corporation | Non-directional ultrasonic transducer |
EP0251797A3 (en) * | 1986-07-02 | 1989-09-13 | Nec Corporation | Non-directional ultrasonic transducer |
US5008580A (en) * | 1988-02-03 | 1991-04-16 | Yoshida Kogyo K. K. | Piezoelectric vibration generator and vibratory parts feeder incorporating the same |
US5578888A (en) * | 1994-12-05 | 1996-11-26 | Kulicke And Soffa Investments, Inc. | Multi resonance unibody ultrasonic transducer |
US6165192A (en) * | 1999-01-05 | 2000-12-26 | Second Sight, Llc | Method and apparatus for intraocular retinal tack inserter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3283182A (en) | Transducer assembly | |
US3992693A (en) | Underwater transducer and projector therefor | |
US3002614A (en) | Vibratory squeeze-forming of metals in the solid state and apparatus therefor | |
US3368085A (en) | Sonic transducer | |
US4072871A (en) | Electroacoustic transducer | |
US3619671A (en) | Transducer for ultrasonic machine tool | |
US3142035A (en) | Ring-shaped transducer | |
US3353040A (en) | Electrodynamic transducer | |
JPH0431480B2 (en) | ||
US3396285A (en) | Electromechanical transducer | |
SE452687B (en) | ELECTROMECHANICAL CONVERTER | |
US2895061A (en) | Piezoelectric sandwich transducer | |
US6016023A (en) | Tubular ultrasonic transducer | |
US3564304A (en) | Electrode configuration for tubular piezoelectric high-strain driver | |
US3466473A (en) | High voltage sonic pulse generator | |
US3148293A (en) | Vibratory device for delivering vibratory energy at high power | |
US3620061A (en) | Design of ultrasonic transducers for use with rolling mill rolls | |
US3434329A (en) | Electrostrictive effect in a transducer for drawing wire,rod or tube | |
US3225227A (en) | Miniature magnetohydrodynamic generator | |
US3139603A (en) | Mass-loaded electromechanical transducer | |
KR960003266Y1 (en) | Vibration driven motor | |
US3521089A (en) | Piezoelectric feedthrough device | |
US3360972A (en) | Magnetomotive metal working device | |
US3885172A (en) | Sonic transducer | |
US4823327A (en) | Electroacoustic transducer |