CN209923388U - Single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device - Google Patents
Single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device Download PDFInfo
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- CN209923388U CN209923388U CN201920111586.7U CN201920111586U CN209923388U CN 209923388 U CN209923388 U CN 209923388U CN 201920111586 U CN201920111586 U CN 201920111586U CN 209923388 U CN209923388 U CN 209923388U
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- 238000001125 extrusion Methods 0.000 title claims abstract description 104
- 238000005728 strengthening Methods 0.000 title claims abstract description 30
- 238000005452 bending Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims description 9
- 230000010287 polarization Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 9
- 230000005284 excitation Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a single-excitation ultrasonic vibration longitudinal bending combined type hole wall extrusion strengthening device, which belongs to a device and a method for hole edge and hole wall extrusion strengthening, the device of the utility model comprises an extrusion head component, the extrusion head component is connected with an amplitude transformer, the amplitude transformer is connected with an ultrasonic longitudinal bending vibration transducer, and the amplitude transformer and the ultrasonic longitudinal bending vibration transducer are connected by screw thread to form an ultrasonic vibrator; the ultrasonic longitudinal bending vibration transducer comprises a front cover plate, a piezoelectric plate, an electrode plate and a rear cover plate which are sequentially connected in series from one end connected with a horn, a sleeve is connected outside the ultrasonic vibrator, an adapter plate is fixedly arranged at the tail end of the sleeve, and the tail end of the adapter plate is connected with a machine tool; the device and the method of the utility model can improve the fatigue strength and the corrosion resistance of the hole, and prolong the service life of the hole, thereby providing a new technology and a new method.
Description
Technical Field
The utility model relates to a device and method that hole limit, pore wall extrusion are reinforceed, concretely relates to single excitation ultrasonic vibration buckling combined type pore wall extrusion is reinforceed device and method.
Background
The mechanism parts are continuously under the action of cyclic stress in the operation process, most of failure modes are fatigue failure, the periphery of a connecting hole of the component is a critical region with concentrated stress, when the hole bears the load, the stress concentration is easily generated, a fatigue crack source is formed, the integral service life of the structural component is shortened, and the service life of the structural component is directly determined by the service life of the hole structure. The hole extrusion technology extrudes an extrusion rod or a ball with the diameter larger than the aperture and the hardness higher than that of a material of a connecting hole through the connecting hole, so that the material of the hole wall generates elastic-plastic deformation, a large-depth high-amplitude controllable residual compressive stress layer is introduced into the hole wall after the hole is extruded and reinforced, the local stress distribution state of the hole edge of the hole structure under the action of external load is improved, the expansion of cracks is inhibited or delayed, the fatigue strength, the stress corrosion resistance and the corrosion fatigue resistance of the connecting hole are greatly improved, and the purpose of prolonging the service life of parts is achieved.
In the hole extrusion process, because the extrusion shaft directly contacts with the inner wall of the hole, the extrusion force is large, the breakage is very easy to occur, especially the extrusion treatment of small hole pieces is carried out, the broken core rod is difficult to take out, the wall surface is easy to scratch, and the finding of a novel hole extrusion mode has very important significance for prolonging the service life of the hole mechanism.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a device is reinforceed in single excitation ultrasonic vibration composite type pore wall extrusion to the problem that exists among the prior art, the utility model discloses a through the supersound vibration transducer that indulges that sets up among the reinforcement device, produce the vibration of indulging under the excitation of ultrasonic power high-frequency electric signal, carry out local intensive processing to hole limit and pore wall, improve connection structure fatigue life to realize connection structure long-life, high reliability, low cost of maintenance's purpose, solved the problem that exists among the prior art.
The utility model discloses such realization:
a single-excitation ultrasonic vibration longitudinal bending combined type hole wall extrusion strengthening device comprises an extrusion head assembly, wherein the extrusion head assembly is connected with an amplitude transformer, the amplitude transformer is connected with an ultrasonic longitudinal bending vibration transducer, and the amplitude transformer and the ultrasonic longitudinal bending vibration transducer are in threaded connection to form an ultrasonic vibrator; the ultrasonic buckling vibration transducer comprises a front cover plate, piezoelectric patches, an electrode plate and a rear cover plate which are sequentially connected in series from one end connected with an amplitude transformer, wherein each piezoelectric patch consists of 1/2 piezoelectric patches with opposite polarization directions to form a whole-circle piezoelectric patch; the ultrasonic vibrator is externally connected with a sleeve, the tail end of the sleeve is fixedly provided with an adapter plate, and the tail end of the adapter plate is connected with a machine tool. The ultrasonic longitudinal-bending vibration transducer is fixedly arranged in the sleeve through a screw, the amplitude transformer is connected with the ultrasonic longitudinal-bending vibration transducer, the extrusion head assembly is fixed at the front end of the amplitude transformer through threads, and the adapter plate is connected with a machine tool and provides extrusion force for the single-excitation ultrasonic vibration longitudinal-bending combined type hole wall extrusion strengthening device.
Furthermore, an aviation plug is arranged on the sleeve; the positive and negative leads of the electrode plate are connected with the socket electrode interface of the aviation plug, and the cable plug of the aviation plug is connected with the positive and negative leads of the ultrasonic power supply outside the sleeve.
Furthermore, four piezoelectric patches are arranged, are connected in series between the front cover plate and the rear cover plate and are pressed and fixed by screws of the rear cover plate.
Furthermore, one end of the amplitude transformer is a stud, and the other end of the amplitude transformer is provided with an internal thread; the extrusion head assembly is in threaded connection with the amplitude transformer through an internal thread; the amplitude transformer is in threaded connection with a front cover plate of the ultrasonic longitudinal bending vibration transducer through a stud.
Further, a flange is arranged on the amplitude transformer, and the ultrasonic vibrator is fixedly connected with the sleeve through the flange on the amplitude transformer and a flange screw.
Furthermore, the adapter plate is fixedly connected with the sleeve through an adapter plate screw.
Furthermore, the extrusion head assembly comprises a slotted bush extrusion head, a reamer, a hole edge extrusion head and a secondary hole wall extrusion head, wherein the slotted bush extrusion head, the reamer, the hole edge extrusion head and the secondary hole wall extrusion head are interchanged according to an ultrasonic extrusion process.
The utility model also discloses a method is reinforceed in extrusion of single excitation ultrasonic vibration buckling combined type pore wall, its characterized in that, the method is as follows:
when the ultrasonic power supply provides a high-frequency electric signal, the 1/2 piezoelectric sheets with opposite polarization directions generate vibration in opposite directions, so that the ultrasonic buckling vibration transducer generates combined vibration in longitudinal and bending directions, and further drives the extrusion head assembly to generate buckling vibration.
The utility model discloses a strengthening method is strengthened, is demolishd and is slotted bush, ultrasonic vibration reaming, ultrasonic vibration drill way extrusion is strengthened, ultrasonic vibration pore wall secondary extrusion is strengthened including slotting bush ultrasonic vibration primary extrusion, and whole strengthening method realizes the vibration strengthening effect on hole limit, pore wall through changing the extrusion head subassembly. The method comprises the following specific steps:
the method comprises the following steps: setting the extrusion head assembly as a slotted bush extrusion head, mounting the workpiece on a slotted bush, and performing primary extrusion strengthening by ultrasonic vibration of the slotted bush;
step two: removing the slotted liner;
step three: replacing the slotted bush extrusion head with a reamer, and performing ultrasonic vibration reaming;
step four: replacing the reamer with a hole edge extrusion head, and carrying out ultrasonic vibration on an orifice for extrusion reinforcement;
step five: and replacing the hole edge extrusion head with a secondary hole wall extrusion head, and carrying out secondary extrusion strengthening on the hole wall by ultrasonic vibration.
Further, in the ultrasonic vibration extrusion process, the maximum axial drawing force of the slotted bush extrusion head, the reamer, the hole edge extrusion head and the secondary hole wall extrusion head is 100kN, the extrusion force control range in the constant extrusion force process is 0.1 kN-80 kN, and the extrusion speed is 0.1-500 mm/min.
Furthermore, the load power of the ultrasonic buckling vibration transducer is 0-1000W, the vibration frequency is 20-50 kHz, and the amplitude is 4-8 mu m.
The utility model discloses with prior art's beneficial effect lie in:
the utility model provides a device for single excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening which can improve the fatigue strength of the hole wall and the hole edge based on the traditional hole wall extrusion method and the problem, and establishes the device for the ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening on the basis, the utility model discloses an ultrasonic longitudinal bending vibration transducer in the device, the transducer generates longitudinal bending vibration under the excitation of ultrasonic power high-frequency electric signals, carries out local strengthening treatment to the hole edge and the hole wall, improves the fatigue life of the connection structure, thereby realizing the purposes of long service life, high reliability and low maintenance cost of the connection structure;
the utility model also discloses an utilize the utility model discloses the strengthening method of strengthening the device utilizes the supersound extrusion method, can improve the fatigue strength and the corrosion resisting property in hole, and the life who improves the hole provides a new technique and method.
Drawings
Fig. 1 is a schematic view of the device for ultrasonic extrusion of the slotted bushing of the present invention;
FIG. 2 is a schematic view of the ultrasonic reaming device of the present invention;
FIG. 3 is a schematic view of the ultrasonic port extrusion apparatus of the present invention;
FIG. 4 is a schematic view of the ultrasonic apparatus for secondary extrusion of hole wall;
FIG. 5 is a flow chart of the single-excitation ultrasonic vibration longitudinal bending combined hole wall extrusion strengthening method of the present invention;
the reference numbers in the figures illustrate: 1. the device comprises a slotted bush extrusion head, 2. an amplitude transformer, 3. a flange screw, 4. an electrode plate, 5. an aviation plug, 6. an adapter plate, 7. an adapter plate screw, 8. a sleeve, 9. a rear cover plate, 10. a piezoelectric plate, 11. a front cover plate, 12. a reamer, 13. a hole edge extrusion head, 14. a secondary hole wall extrusion head, 15. a machine tool, 16. a workpiece and 17. a slotted bush.
Detailed Description
In order to make the purpose, technical solution and effect of the present invention clearer and more clear, it is clear that the following list examples are to the present invention for further detailed description. It should be noted that the embodiments described herein are only for explaining the present invention and are not used to limit the present invention.
As shown in fig. 1 ~ 4, the utility model discloses a device is including extrusion head subassembly, becomes width of cloth pole 2, flange screw 3, electrode slice 4, aviation plug 5, adapter plate 6, adapter plate screw 7, sleeve 8, back shroud 9, piezoelectric patches 10, front shroud 11, reamer 12, hole limit extrusion head 13, secondary pore wall extrusion head 14, lathe 15, extrusion head subassembly wherein includes slotted bush extrusion head 1, reamer 12, hole limit extrusion head 13, secondary pore wall extrusion head 14 to can dismantle according to the process of extrusion strengthening the hole and change required extrusion head.
The front cover plate 11, the piezoelectric patch 10, the electrode plate 4 and the rear cover plate 9 are sequentially connected in series to assemble an ultrasonic buckling vibration transducer; the amplitude transformer 2 is connected with the ultrasonic longitudinal bending vibration transducer through threads to form an ultrasonic vibrator, and the ultrasonic vibrator is connected and fixed with the sleeve 8 through a flange of the amplitude transformer 2 and a flange screw 3; the extrusion head assembly is connected with the amplitude transformer 2 through threads; the positive and negative leads of the electrode plate 4 are connected with the socket electrode interface of the aviation plug 5, and the positive and negative leads of the ultrasonic power supply are connected with the cable plug of the aviation plug 5; the adapter plate 6 is fixedly connected with the sleeve 8 through an adapter plate screw 7; meanwhile, the tail end of the adapter plate 6 is connected with a machine tool 15, and the machine tool 15 provides extrusion force for the whole single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device.
The ultrasonic buckling vibration transducer is formed by sequentially connecting and assembling a front cover plate 11, a piezoelectric sheet 10, an electrode sheet 4 and a rear cover plate 9 in series, wherein the piezoelectric sheet 10 is a full-circle piezoelectric sheet formed by 1/2 piezoelectric sheets with opposite polarization directions; when the ultrasonic power supply provides a high-frequency electric signal, the 1/2 piezoelectric sheets with opposite polarization directions generate vibration in opposite directions, so that the ultrasonic buckling vibration transducer generates combined vibration in longitudinal and bending directions, and further drives the extrusion head assembly to generate buckling vibration; the load power of the ultrasonic buckling vibration transducer is 0-1000W, the vibration frequency is 20-50 kHz, and the amplitude is 4-8 mu m.
The single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening method mainly comprises the following steps: carrying out ultrasonic vibration primary extrusion strengthening on the slotted bushing; the second step is that: removing the slotted liner; the third step: reaming by ultrasonic vibration; the fourth step: carrying out extrusion strengthening on an ultrasonic vibration orifice; the fifth step: and (5) carrying out secondary extrusion strengthening on the hole wall by ultrasonic vibration. In the ultrasonic vibration extrusion process, the maximum axial drawing force of the extrusion head assembly is 100kN, the extrusion force control range in the constant extrusion force process is 0.1 kN-80 kN, and the extrusion speed is 0.1-500 mm/min.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (7)
1. A single-excitation ultrasonic vibration longitudinal bending combined type hole wall extrusion strengthening device comprises an extrusion head assembly, and is characterized in that the extrusion head assembly is connected with an amplitude transformer (2), the amplitude transformer (2) is connected with an ultrasonic longitudinal bending vibration transducer, and the amplitude transformer (2) and the ultrasonic longitudinal bending vibration transducer are in threaded connection to form an ultrasonic vibrator; the ultrasonic longitudinal bending vibration transducer comprises a front cover plate (11), a piezoelectric sheet (10), an electrode sheet (4) and a rear cover plate (9) in sequence from one end connected with an amplitude transformer (2), and the front cover plate, the piezoelectric sheet, the electrode sheet and the rear cover plate are connected in series; each piezoelectric sheet (10) is a full-circle piezoelectric sheet formed by two 1/2 piezoelectric sheets with opposite polarization directions; the ultrasonic vibrator is externally connected with a sleeve (8), the tail end of the sleeve (8) is fixedly provided with an adapter plate (6), and the tail end of the adapter plate (6) is connected with a machine tool (15).
2. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein an aviation plug (5) is arranged on said sleeve (8); the positive and negative leads of the electrode plate (4) are connected with the socket electrode interface of the aviation plug (5), and the cable plug of the aviation plug (5) is connected with the positive and negative leads of the ultrasonic power supply outside the sleeve (8).
3. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein said piezoelectric sheets (10) are provided in four pieces, and said piezoelectric sheets (10) are connected in series between a front cover plate (11) and a rear cover plate (9) and are pressed and fixed by screws of the rear cover plate.
4. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein one end of said horn (2) is a stud, and the other end is provided with internal threads; the extrusion head assembly is in threaded connection with the amplitude transformer (2) through an internal thread; the amplitude transformer (2) is in threaded connection with a front cover plate (11) of the ultrasonic longitudinal bending vibration transducer through a stud.
5. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein a flange is arranged on the amplitude transformer (2), and the ultrasonic vibrator is fixedly connected with the sleeve (8) through the flange on the amplitude transformer (2) and the flange screw (3).
6. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein said adapter plate (6) is fixedly connected with the sleeve (8) through an adapter plate screw (7).
7. The single-excitation ultrasonic vibration buckling composite hole wall extrusion strengthening device as recited in claim 1, wherein said extrusion head assembly comprises a slotted bushing extrusion head (1), a reamer (12), a hole edge extrusion head (13), and a secondary hole wall extrusion head (14), said slotted bushing extrusion head (1), reamer (12), hole edge extrusion head (13), and secondary hole wall extrusion head (14) being interchangeable according to an ultrasonic extrusion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920111586.7U CN209923388U (en) | 2019-01-23 | 2019-01-23 | Single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920111586.7U CN209923388U (en) | 2019-01-23 | 2019-01-23 | Single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109762974A (en) * | 2019-01-23 | 2019-05-17 | 南京航空航天大学 | Curved combined type cold-expansion-hole device and intensifying method are indulged in single excitation ultrasonic vibration |
| CN113977190A (en) * | 2021-11-23 | 2022-01-28 | 南京航空航天大学 | Ultrasonic vibration auxiliary hole extrusion strengthening device, design method and operation process thereof |
| CN114085968A (en) * | 2021-11-19 | 2022-02-25 | 成都浩益科技有限公司 | Method for reinforcing slotted bushing cold extrusion assembly hole and matched tool device |
| CN115232937A (en) * | 2022-07-21 | 2022-10-25 | 清华大学 | Inner hole strengthening device with longitudinal and bending matched vibration |
-
2019
- 2019-01-23 CN CN201920111586.7U patent/CN209923388U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109762974A (en) * | 2019-01-23 | 2019-05-17 | 南京航空航天大学 | Curved combined type cold-expansion-hole device and intensifying method are indulged in single excitation ultrasonic vibration |
| CN109762974B (en) * | 2019-01-23 | 2024-06-11 | 南京航空航天大学 | Single-excitation ultrasonic vibration longitudinal bending composite hole wall extrusion strengthening device and strengthening method |
| CN114085968A (en) * | 2021-11-19 | 2022-02-25 | 成都浩益科技有限公司 | Method for reinforcing slotted bushing cold extrusion assembly hole and matched tool device |
| CN114085968B (en) * | 2021-11-19 | 2023-08-11 | 成都浩益科技有限公司 | Method for reinforcing cold extrusion assembly holes of slotted bushing and matched tooling device |
| CN113977190A (en) * | 2021-11-23 | 2022-01-28 | 南京航空航天大学 | Ultrasonic vibration auxiliary hole extrusion strengthening device, design method and operation process thereof |
| CN113977190B (en) * | 2021-11-23 | 2022-10-25 | 南京航空航天大学 | Ultrasonic vibration auxiliary hole extrusion strengthening device, design method and operation process thereof |
| CN115232937A (en) * | 2022-07-21 | 2022-10-25 | 清华大学 | Inner hole strengthening device with longitudinal and bending matched vibration |
| CN115232937B (en) * | 2022-07-21 | 2024-04-19 | 清华大学 | Inner hole strengthening device for longitudinal bending matching vibration |
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