CN104439681A - Single-excitation ultrasonic elliptical vibration metal welding device - Google Patents
Single-excitation ultrasonic elliptical vibration metal welding device Download PDFInfo
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- CN104439681A CN104439681A CN201410740222.7A CN201410740222A CN104439681A CN 104439681 A CN104439681 A CN 104439681A CN 201410740222 A CN201410740222 A CN 201410740222A CN 104439681 A CN104439681 A CN 104439681A
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- vibration
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- excitation ultrasonic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
Abstract
The invention discloses a single-excitation ultrasonic elliptical vibration metal welding device which comprises a pressure device, an ultrasonic vibration isolation device, a shell unit, an ultrasonic vibration transducer arranged in the shell unit, an elliptical vibration mode converter, a vibration head arranged at the front end of the elliptical vibration mode converter, an upper sound pole arranged below the vibration head, a lower sound pole and an ultrasonic power supply, wherein the shell unit comprises a front baffle, a sleeve and a rear baffle; the ultrasonic vibration transducer comprises a bolt, and a rear cover plate, a piezoelectric ceramic piece, an electrode slice and a front cover plate, which are arranged on the bolt in a sleeving manner in sequence, and the rear cover plate and the front cover plate connect and press the rear cover plate, the piezoelectric ceramic piece, the electrode slice and the front cover plate through the bolt; the elliptical vibration mode converter is arranged at the front end of the front cover plate and adopts a wedge-shaped structure, and the elliptical vibration mode converter can convert longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer into longitudinal bending composite ultrasonic elliptical vibration of the tail end of the elliptical vibration mode converter and the vibration head.
Description
Technical field
The present invention relates to ultrasonic vibration metal welding techniques field, especially relate to a kind of ultrasonic vibration metal welding device utilizing single excitation ultrasonic elliptical vibratory.
Background technology
Ultrasonic wave, as a kind of mechanical oscillation, is also the carrier of energy transferring simultaneously, is widely applied in actual production, life.Current ultrasonic wave is also more and more extensive in the application of welding field, has in succession occurred the series of new techniques such as the welding of Ultrasonic Plastic Welding, ultrasonic wave metal, ultrasonic brazing, arc-ultrasonic solder technology, ultrasonic-TIG composite welding and ultrasonic-MIG composite welding.
Ultrasonic wave metal welding converts 15 ~ 20KHz high frequency electric to by 50Hz low-frequency current, high-frequency electrical energy converts mechanical vibrational energy under certain static pressure effect through bonding machine transducing head, make to be formed between metal surface the Solid-phase welding method interpenetrating phase counterdiffusion that body surface and oxide to scatter between a kind of same metal of the metallographic structure not changing himself or dissimilar metal surface molecular by friction, in welding process, metal surface does not reach fusing point, but under mechanical oscillation rubbing action, produce a large amount of heats, therefore the abundant cooling that must ensure soldering tip and weldering seat after welding is each time needed, thus set up one totally, controlled, the layer of diffusion.
Ultrasonic elliptical vibratory has in fields such as UVC, ultra-sonic welded, ultrasonic grinding, ultrasonic polishing, linear ultrasonic motor and rotary ultrasonic motors to be applied more widely.Current researcher adopts extensional vibration mostly, twisting vibration, two kinds of vibration modes in flexural vibrations and radial vibration carry out compound to produce ultrasonic elliptical vibratory, the piezoelectric ceramic piece adopting two groups or more is needed to excite the two or more mode of oscillations producing and have certain phase difference, also be necessary for often group piezoelectric ceramic piece and be equipped with a road ultrasound-driven power supply signal, and need to control the phase difference between the ultrasound-driven power supply signal of each road, ultrasonic vibration system and Control system architecture complexity, manufacture difficulty is large, control difficulty is high, production cost is high, not easily realize microminiaturization, service behaviour is stable not, these problems constrain the application in the industrial production of ultrasonic elliptical vibratory transducer and popularization.
In order to improve effect and the welding efficiency of ultrasonic wave metal welding further, and give full play to the advantage of single excitation ultrasonic elliptical vibratory, the present invention have studied a kind of novel list excitation ultrasonic elliptical vibratory metal welding device.
Summary of the invention
The invention provides a kind of novel list excitation ultrasonic elliptical vibratory metal welding device, object is the advantage in order to give full play to single excitation ultrasonic elliptical vibratory, the effect improving ultrasonic metal welding and welding efficiency.
Single excitation ultrasonic elliptical vibratory metal welding device, comprise pressue device, ultrasonic vibration spacer assembly, housing unit, the single-excitation ultrasonic oval vibration energy converter be placed in housing unit, elliptical vibration modal transducer, be arranged on elliptical vibration modal transducer front end vibration head, be arranged on the upper applicator below vibration head, lower applicator and ultrasonic-frequency power supply; Ultrasonic vibration spacer assembly is arranged between pressue device and vibration head, for isolating the impact of pressue device on the first-class ultrasonic vibration system of vibration; Upper applicator is arranged on the below of vibration head by welding or screw attachment, and lower applicator is arranged on the below of workpiece to be welded, is coaxially oppositely arranged with upper applicator; Described housing unit comprises front apron, sleeve and backboard; Described single-excitation ultrasonic oval vibration energy converter outline is cylindrical, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the ring flange connected with housing unit, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud, constitute the energy conversion part of single-excitation ultrasonic oval vibration energy converter, the ultrasonic electric signal that ultrasonic-frequency power supply exports can be converted to the longitudinal ultrasonic vibration of single-excitation ultrasonic oval vibration energy converter.
Described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud, or the welding of elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer is inclined wedge-shaped structure, the former entirety of inclined wedge-shaped structure elliptical vibration modal transducer is cuboid, inclined wedge-shaped structure is formed be cut a part along its side of single-excitation ultrasonic oval vibration energy converter axis direction after, formed in two sides of inclined wedge-shaped, not cut side is parallel to single-excitation ultrasonic oval vibration energy converter axis, the another side be cut becomes 3-30 degree angle with single-excitation ultrasonic oval vibration energy converter axis.Transition arc is provided with in the connection place of elliptical vibration modal transducer and ultrasonic transducer front shroud; The central axis of ultrasonic transducer is vertical with the geometric centre axes of vibration head; In inclined wedge-shaped structure elliptical vibration modal transducer along the side of two approximate trapezoid of ultrasonic transducer axis direction and the geometric centre axes of vibration head also vertical.
The sub-assembly that elliptical vibration modal transducer is formed after being arranged on single-excitation ultrasonic oval vibration energy converter front end is called single excitation ultrasonic elliptical vibratory transducer, the object making elliptical vibration modal transducer become inclined wedge-shaped structure is the mode of oscillation in order to change single excitation ultrasonic elliptical vibratory transducer, make its longitudinal vibration mode frequency and flexural vibration mode frequency close to or equal; Due to the existence of inclined wedge-shaped structure elliptical vibration modal transducer, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is after being delivered to inclined wedge-shaped structure elliptical vibration modal transducer, be a part of extensional vibration component and a part of flexural vibrations component at the end parse of inclined wedge-shaped structure elliptical vibration modal transducer, and two oscillating components have certain phase difference, and then be compounded to form elliptic vibrations at the end of inclined wedge-shaped structure elliptical vibration modal transducer.
Vibration head is by welding or connected the front end being arranged on elliptical vibration modal transducer by a joint bolt; After ultrasonic vibrational energy is delivered to elliptical vibration modal transducer end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of extensional vibration and the flexural vibrations compound with certain phase difference, namely be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end, and drive vibration head to do ultrasonic elliptical vibratory together with elliptical vibration modal transducer end.
Single-excitation ultrasonic oval vibration energy converter is placed in housing unit, the ring flange of single-excitation ultrasonic oval vibration energy converter is arranged in the fovea superior seam of sleeve, front apron is arranged on the opposite side of ring flange, fixation is risen to whole single-excitation ultrasonic oval vibration energy converter, backboard is arranged on the rear side of sleeve, prevent the foreign material such as dust, iron filings from entering in housing unit, affect single-excitation ultrasonic oval vibration energy converter service behaviour; Compare the ultrasonic vibration welder that existing document is introduced, this list excitation ultrasonic elliptical vibratory welder has that power capacity is large, energy conversion efficiency is high, flexural vibrations amplitude is large, structure simple, easy to manufacture, cost is low, the rigidity of structure is large, control-driven system is simple, speed of welding is fast, solder joint area is large, weld strength is high and the advantage such as stable work in work.
Further, described single-excitation ultrasonic oval vibration energy converter only has one group of extensional vibration piezoelectric ceramic piece.
Further, described single-excitation ultrasonic oval vibration energy converter only needs a road ultrasonic electric signal excitation.
Further, the operating frequency range of described single-excitation ultrasonic oval vibration energy converter is 18kHz-40kHz.
Present invention employs the vertical curved composite ultrasonic elliptical vibratory that mechanical oscillation MODAL TRANSFORMATION OF A mechanism is converted to the extensional vibration of single-excitation ultrasonic oval vibration energy converter elliptical vibration modal transducer end and vibration head, simplify the overall structure of single excitation ultrasonic elliptical vibratory welding system, greatly reduce the complexity of vibrational system, reduce manufacture, assembly difficulty and production cost; This invention only needs a road control circuit and ultrasonic-frequency power supply to encourage in addition, control difficulty is low, avoid the complicated ultrasonic-frequency power supply development cost that two-phase or multiphase ultrasonic vibration is compounded to form elliptical vibration transducer, simplify control circuit and ultrasonic-frequency power supply structure, reduce control circuit and ultrasonic-frequency power supply cost, be easy to realize the integrated of control circuit and ultrasonic-frequency power supply, improve system works reliability, stable work in work, has a extensive future.
Fig. 1 is the front view of structural representation of the present invention.
Fig. 2 is the top view of structural representation of the present invention.
Fig. 3 is the front view of single excitation ultrasonic elliptical vibratory transducer in the present invention.
Fig. 4 is the top view of single excitation ultrasonic elliptical vibratory transducer in the present invention.
Fig. 5 is application example schematic diagram of the present invention.
Number in the figure illustrates: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. ring flange, 7. elliptical vibration modal transducer, 8. vibration head, 9. front apron, 10. sleeve, 11. backboards, 12. pressue devices, 13. ultrasonic vibration spacer assemblys, applicator on 14., workpiece on 15., 16. times workpiece, 17. times applicators, 18. ultrasonic-frequency power supplies.
Detailed description of the invention
Shown in composition graphs 1,2,3,4, single excitation ultrasonic elliptical vibratory metal welding device, comprise pressue device 12, ultrasonic vibration spacer assembly 13, housing unit, the single-excitation ultrasonic oval vibration energy converter be placed in housing unit, elliptical vibration modal transducer 7, be arranged on elliptical vibration modal transducer 7 front end vibration head 8, be arranged on upper applicator 14, lower applicator 17 and ultrasonic-frequency power supply 18 below vibration head 8; Ultrasonic vibration spacer assembly 13 is arranged between pressue device 12 and vibration head 8, for isolating the impact of pressue device 12 on ultrasonic vibration system such as vibration head 8 grade; Upper applicator 14 is arranged on the below of vibration head 8 by welding or screw attachment, and lower applicator 17 is arranged on the below of workpiece to be welded, is coaxially oppositely arranged with upper applicator 14; Described housing unit comprises front apron 9, sleeve 10 and backboard 11; Described single-excitation ultrasonic oval vibration energy converter outline is cylindrical, it comprises bolt 1 and is set in back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and the front shroud 5 on bolt 1 successively, front shroud 5 is provided with the ring flange 6 connected with housing unit, back shroud 2, piezoelectric ceramic piece 3, electrode slice 4 and front shroud 5 are connected compression by bolt 1 by back shroud 2 and front shroud 5, constitute the energy conversion part of single-excitation ultrasonic oval vibration energy converter, the ultrasonic electric signal that ultrasonic-frequency power supply 18 can be exported is converted to the longitudinal ultrasonic vibration of single-excitation ultrasonic oval vibration energy converter.Single-excitation ultrasonic oval vibration energy converter only has one group of extensional vibration piezoelectric ceramic piece 3, piezoelectric ceramic transducer section diameter 30mm, and piezoelectric ceramic piece 3 is PZT-8, is of a size of:
Ф 30 × Ф 15 × 5, the sheet number of piezoelectric ceramic piece 3 is 2.
Elliptical vibration modal transducer 7 and front shroud 5 are made into the front end that an one-piece parts is arranged on front shroud 5, and elliptical vibration modal transducer 7 entirety is inclined wedge-shaped structure, and the former entirety of inclined wedge-shaped structure elliptical vibration modal transducer 7 is cuboid, and the cross section length of side is 15
×15mm, long 40mm, inclined wedge-shaped structure is formed be cut a part along its side of single-excitation ultrasonic oval vibration energy converter axis direction after, formed in two sides of inclined wedge-shaped, not cut side is parallel to single-excitation ultrasonic oval vibration energy converter axis, and the another side be cut becomes 10 degree of angles with single-excitation ultrasonic oval vibration energy converter axis.Vibration head 8 connects the front end being arranged on elliptical vibration modal transducer 7 by joint bolt.The central axis of ultrasonic transducer is vertical with the geometric centre axes of vibration head 8; In inclined wedge-shaped structure elliptical vibration modal transducer 7 along the side of two approximate trapezoid of ultrasonic transducer axis direction and the geometric centre axes of vibration head 8 also vertical.
Single-excitation ultrasonic oval vibration energy converter is placed in housing unit, the ring flange 6 of single-excitation ultrasonic oval vibration energy converter is arranged in the fovea superior seam of sleeve 10, front apron 9 is linked together by screw and sleeve 10, be pressed on the opposite side of ring flange 6, play fixation to whole single-excitation ultrasonic oval vibration energy converter, backboard 11 is by the rear side of screw attachment at sleeve 10.
Intrinsic frequency after single-excitation ultrasonic oval vibration energy converter and elliptical vibration modal transducer 7 connect is 19.84KHz, impedance is 83 ohm, dynamic electric resistor is 19 ohm, ultrasonic-frequency power supply 18 output voltage range is 0-400V, current range is 0-4A, output frequency is 19.84 ± 0.01KHz, and ultrasonic-frequency power supply 18 has automatic frequency tracking function in designated frequency range.
Shown in composition graphs 5, during operation, the electrode slice 4 of single-excitation ultrasonic oval vibration energy converter is connected with ultrasonic-frequency power supply 18, after the electrode slice 4 of single-excitation ultrasonic oval vibration energy converter accesses the signal of telecommunication of ultrasonic-frequency power supply 18 output, due to the inverse piezoelectric effect of piezoelectric ceramic piece 3, piezoelectric ceramic piece 3 will produce longitudinal ultrasonic vibration, namely the electric energy that ultrasonic-frequency power supply 18 exports is converted to longitudinal ultrasonic vibration by single-excitation ultrasonic oval vibration energy converter, and drive whole single-excitation ultrasonic oval vibration energy converter system to carry out longitudinal ultrasonic vibration, after ultrasonic vibrational energy is delivered to elliptical vibration modal transducer 7 end from single-excitation ultrasonic oval vibration energy converter, be converted to the vertical curved composite ultrasonic elliptical vibratory of extensional vibration and the flexural vibrations compound with certain phase difference, namely the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer 7 end is converted to, and drive vibration head 8 to do ultrasonic elliptical vibratory together with upper applicator 14.
After on-load voltage runs 10 minutes, single excitation ultrasonic elliptical vibratory metal welding device reaches stable vibration state, now the regulated output voltage of ultrasonic-frequency power supply 18 is 220V, electric current is 1.15A, use laser doppler vibrometer to record ultrasonic elliptical vibratory length semiaxis amplitude and be respectively 12.6 microns and 4.4 microns, and by the dual trace oscilloscope with lissajouf figure calculation function, graphic operation is carried out to the signal that laser doppler vibrometer records, the ultrasonic elliptical vibratory track that axial ratio is 2.86 can be obtained, meet the requirement of ultrasonic elliptical vibratory welding completely.
Regulate the running parameter of ultrasonic-frequency power supply 18: power output P=80W, operating frequency f=19.84 ± 1KHz, automatic frequency tracking function is opened, now vibration head 8 elliptical vibration length semiaxis amplitude is respectively 6 microns and 2.2 microns, on-load pressure 20N between upper and lower applicator, welding duration t=60s; Achieve the welding that two pieces of thickness are 45 steel plates of 1.0mm, the shear strength of connecting joint reaches 462MPa.
Claims (7)
1. single excitation ultrasonic elliptical vibratory metal welding device, is characterized in that: this metal welding device comprise pressue device, ultrasonic vibration spacer assembly, housing unit, the single-excitation ultrasonic oval vibration energy converter be placed in housing unit, elliptical vibration modal transducer, be arranged on elliptical vibration modal transducer front end vibration head, be arranged on the upper applicator below vibration head, lower applicator and ultrasonic-frequency power supply; Ultrasonic vibration spacer assembly is arranged between pressue device and vibration head, for isolating the impact of pressue device on the first-class ultrasonic vibration system of vibration; Lower applicator is arranged on the below of workpiece to be welded, is coaxially oppositely arranged with upper applicator; Described housing unit comprises front apron, sleeve and backboard; Described single-excitation ultrasonic oval vibration energy converter outline is cylindrical, it comprises bolt and is set in back shroud, piezoelectric ceramic piece, electrode slice and the front shroud on bolt successively, front shroud is provided with the ring flange connected with housing unit, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are connected compression by bolt by back shroud and front shroud; Described elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer is inclined wedge-shaped structure, the former entirety of inclined wedge-shaped structure elliptical vibration modal transducer is cuboid, inclined wedge-shaped structure is formed be cut a part along its side of single-excitation ultrasonic oval vibration energy converter axis direction after, formed in two sides of inclined wedge-shaped, not cut side is parallel to single-excitation ultrasonic oval vibration energy converter axis, and the another side be cut becomes 3-30 degree angle with single-excitation ultrasonic oval vibration energy converter axis; Be provided with transition arc in the connection place of elliptical vibration modal transducer and ultrasonic transducer front shroud, the central axis of ultrasonic transducer is vertical with the geometric centre axes of vibration head; Side along two approximate trapezoid of ultrasonic transducer axis direction in inclined wedge-shaped structure elliptical vibration modal transducer is vertical with the geometric centre axes of vibration head.
2. single excitation ultrasonic elliptical vibratory metal welding device according to claim 1, is characterized in that: described elliptical vibration modal transducer and front shroud are made into the front end that is integrally provided in front shroud.
3. single excitation ultrasonic elliptical vibratory metal welding device according to claim 1, is characterized in that: described elliptical vibration modal transducer welding is arranged on front shroud front end.
4. the list excitation ultrasonic elliptical vibratory metal welding device according to claim 1 or 2 or 3, is characterized in that: described vibration head is arranged on the front end of elliptical vibration modal transducer by welding.
5. the list excitation ultrasonic elliptical vibratory metal welding device according to claim 1 or 2 or 3, is characterized in that: also comprise a joint bolt, for vibration head being connected in the front end of elliptical vibration modal transducer.
6. the list excitation ultrasonic elliptical vibratory metal welding device according to claim 1 or 2 or 3, is characterized in that: described upper applicator is arranged on the below of vibration head by welding.
7. the list excitation ultrasonic elliptical vibratory metal welding device according to claim 1 or 2 or 3, is characterized in that: described upper applicator is arranged on the below of vibration head by screw attachment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410740222.7A CN104439681A (en) | 2014-12-09 | 2014-12-09 | Single-excitation ultrasonic elliptical vibration metal welding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410740222.7A CN104439681A (en) | 2014-12-09 | 2014-12-09 | Single-excitation ultrasonic elliptical vibration metal welding device |
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| CN104439681A true CN104439681A (en) | 2015-03-25 |
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| CN201410740222.7A Pending CN104439681A (en) | 2014-12-09 | 2014-12-09 | Single-excitation ultrasonic elliptical vibration metal welding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397274A (en) * | 2015-12-30 | 2016-03-16 | 苏州润昇精密机械有限公司 | Welding head structure for ultrasonic metal welding machine |
| CN114669857A (en) * | 2022-04-24 | 2022-06-28 | 广东利元亨智能装备股份有限公司 | Welding head assembly, ultrasonic three-way set and ultrasonic welding machine |
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| JPH0629357A (en) * | 1992-06-26 | 1994-02-04 | Suzuki Motor Corp | Ultrasonic welding apparatus |
| CN102229022A (en) * | 2011-06-21 | 2011-11-02 | 西安理工大学 | Ultrasonically-assisted metastable alloy rapidly-solidifying welding device and method |
| CN103192097A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Single driven ultrasonic elliptical vibration turning device |
| CN103447557A (en) * | 2013-08-26 | 2013-12-18 | 苏州科技学院 | Single-driven ultrasonic elliptical vibration turning device |
| CN204366261U (en) * | 2014-12-09 | 2015-06-03 | 苏州科技学院 | Single excitation ultrasonic elliptical vibratory metal welding device |
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2014
- 2014-12-09 CN CN201410740222.7A patent/CN104439681A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629357A (en) * | 1992-06-26 | 1994-02-04 | Suzuki Motor Corp | Ultrasonic welding apparatus |
| CN102229022A (en) * | 2011-06-21 | 2011-11-02 | 西安理工大学 | Ultrasonically-assisted metastable alloy rapidly-solidifying welding device and method |
| CN103192097A (en) * | 2013-05-08 | 2013-07-10 | 苏州科技学院 | Single driven ultrasonic elliptical vibration turning device |
| CN103447557A (en) * | 2013-08-26 | 2013-12-18 | 苏州科技学院 | Single-driven ultrasonic elliptical vibration turning device |
| CN204366261U (en) * | 2014-12-09 | 2015-06-03 | 苏州科技学院 | Single excitation ultrasonic elliptical vibratory metal welding device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397274A (en) * | 2015-12-30 | 2016-03-16 | 苏州润昇精密机械有限公司 | Welding head structure for ultrasonic metal welding machine |
| CN114669857A (en) * | 2022-04-24 | 2022-06-28 | 广东利元亨智能装备股份有限公司 | Welding head assembly, ultrasonic three-way set and ultrasonic welding machine |
| CN114669857B (en) * | 2022-04-24 | 2024-02-23 | 广东利元亨智能装备股份有限公司 | Welding head assembly, ultrasonic triple set and ultrasonic welding machine |
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Address after: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant after: Suzhou University of Science and Technology Address before: 215009 Suzhou City, Jiangsu province high tech Zone CREE Road, No. 1 Applicant before: University of Science and Technology of Suzhou |
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Application publication date: 20150325 |