CN215954157U - Amplitude and frequency adjustable one-way excitation device - Google Patents
Amplitude and frequency adjustable one-way excitation device Download PDFInfo
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- CN215954157U CN215954157U CN202122276291.5U CN202122276291U CN215954157U CN 215954157 U CN215954157 U CN 215954157U CN 202122276291 U CN202122276291 U CN 202122276291U CN 215954157 U CN215954157 U CN 215954157U
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- 230000005284 excitation Effects 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a unidirectional excitation device with adjustable amplitude and frequency, which comprises a frame, an oscillation starting mechanism and an amplitude fine adjustment mechanism, wherein the upper surface of the frame is provided with the oscillation starting mechanism, a guide rod barrel in the oscillation starting mechanism is arranged on the frame, the upper end of the guide rod barrel is provided with a spring, the spring supports an oscillation starting plate, two sides of the oscillation starting plate are provided with vibration motors, the upper surface of the oscillation starting plate is provided with the amplitude fine adjustment mechanism, two ends of a connecting rod in the amplitude fine adjustment mechanism are connected with a shaft, the lower shaft is provided with a bearing seat, the bearing seat is arranged on the oscillation starting plate, the upper shaft is arranged on a sliding block, the sliding block is connected with a lead screw, the lead screw is rotatably connected with a vibration table, the lead screw is connected with a servo motor, a high-precision displacement sensor is arranged on the frame, a high-precision displacement sensor, a comparator and a PID controller are sequentially connected with a data line, the PID controller is connected with the servo motor through a data transmission line, the comparator, the PID controller and the servo motor are connected in series to form a closed-loop feedback control system. The utility model has simple structure, easy disassembly and assembly, safety and reliability.
Description
Technical Field
The utility model belongs to the field of vibration-assisted plastic processing, and particularly relates to a unidirectional excitation device with adjustable amplitude and frequency.
Background
The exciter is a device attached to some machines and equipments for generating exciting force, and is an important part for utilizing mechanical vibration. The vibration exciters are classified into inertial type electric, electromagnetic type, electrohydraulic type, pneumatic type, and hydraulic type according to the excitation type. The exciter can generate unidirectional or multidirectional, simple harmonic or non-simple harmonic exciting force. Even number shaft vibration exciters or even number single shaft vibration exciters with the same type and specification are arranged in parallel and symmetrically and run in the opposite direction to drive corresponding equipment to vibrate in an approximate straight line.
The vibration-assisted plastic processing is a new edge crossing discipline developed by introducing vibration into the field of plastic forming in recent years, and the effective addition of a vibration field can enable metal to flow more uniformly in the plastic forming process of metal, reduce forming resistance, strengthen the forming limit of metal materials and improve the surface quality of formed parts, so that the surface quality with high structure performance and high precision can be obtained, and the forming and integrated preparation of parts difficult to deform can be realized. It is necessary to add effective vibration to the plastic forming process of the hard-to-deform metal. However, the vibration exciter applied to the vibration-assisted plastic forming technology at present must have the characteristics of meeting the requirements of outputting high-power and small-amplitude vibration and being adjustable in amplitude and frequency. The mechanical vibration exciter is less applied to the field of vibration plastic processing due to the volume of equipment; the existing electromagnetic vibration exciter can bear small load although the equipment volume is small and the control is convenient, and is difficult to be applied to the field of vibration-assisted plastic processing with larger load requirements at present; the existing high-power hydraulic vibration exciter needs to be provided with a hydraulic pump station and a complex reversing system, so that the manufacturing cost is high, and the medium is difficult to apply to the field of vibration-assisted plastic processing with small amplitude and high precision due to the compressibility of the medium.
With the development of precision machining technology, the traditional plastic forming process also needs to introduce vibration assistance to reduce forming force and improve forming quality. Different vibration mode parameters are often required to be matched for different plastic forming processes, equipment and forming parts so as to effectively add vibration, and the vibration excitation device is required to realize output with adjustable amplitude and frequency and controllable vibration direction. Therefore, the development of the vibration exciter with simple structure, large output power, adjustable amplitude and frequency and controllable vibration direction has very important significance.
Disclosure of Invention
The utility model aims to effectively add vibration energy in the vibration-assisted plastic forming process and provides a unidirectional vibration excitation device with adjustable amplitude and frequency.
The technical scheme adopted by the utility model is as follows: the utility model provides an amplitude and one-way excitation device of frequency adjustable which characterized in that: it includes that set gradually from bottom to top: the vibration exciter comprises a frame, a vibration starting mechanism for providing vibration of the vibration exciter, and an amplitude fine-tuning mechanism for adjusting the amplitude of the vibration exciter; the vibration starting mechanism comprises a vibration motor, a vibration starting plate and a spring, the vibration motor provides exciting force to act on the vibration starting plate, the vibration starting plate is excited under the action of the spring, the amplitude fine adjustment mechanism comprises a bearing seat, a connecting rod, a sliding block, a vibration table, a screw rod, a comparator, a PID (proportion integration differentiation) controller, a servo motor and a high-precision displacement sensor, the connecting rod transmits the vibration of the vibration starting plate to the vibration table, data measured by the high-precision displacement sensor is transmitted to the comparator, and the comparator is connected with the PID controller and the servo motor in series to form a closed-loop feedback control system. The position of the connecting rod is directly and dynamically adjusted by a closed-loop feedback control system, so that the amplitude transmitted to the vibration table is dynamically and finely adjusted.
Furthermore, the vibration starting mechanism comprises a guide rod cylinder, a guide rod seat, a spring, a vibration starting plate, a vibration motor and a frequency converter, wherein the guide rod cylinder is installed on the rack, the guide rod is movably connected with the guide rod cylinder, the guide rod is installed on the guide rod seat, the guide rod seat is installed on the vibration starting plate, the spring is sleeved on the guide rod, and the vibration motor is installed on the vibration starting plate.
Furthermore, the parts of the guide rod cylinder, the guide rod seat and the spring are respectively arranged on the vibration starting plate, and are uniformly distributed and installed.
Furthermore, the vibration motors are even in number and are uniformly distributed and symmetrically arranged on the vibration starting plate.
Further, the vibration motor is a vibration source.
Furthermore, the amplitude fine-tuning comprises bearing frame, bearing, axle sleeve, axle, end cover, connecting rod, slider, lead screw, high accuracy displacement sensor, servo motor, controller, shaking table and comparator, high accuracy displacement sensor install in the frame, the bearing frame is installed on the board that shakes, the axle passes through the bearing and installs on bearing frame and slider, the connecting rod is installed on the axle, slider and shaking table sliding connection, slider and lead screw roll connection, the lead screw is connected with servo motor, comparator and controller are installed at the both ends of shaking table symmetry, high accuracy displacement sensor connects the comparator through data transmission line, the comparator passes through data transmission line connection PID controller, the PID controller passes through data transmission line connection servo motor.
Furthermore, the connecting rods are even in number and are uniformly distributed and symmetrically arranged.
Based on the technical scheme, the utility model has the following beneficial effects and advantages:
the vibration starting mechanism of the utility model utilizes an even number of vibration motors which are symmetrically distributed to replace the combination of the motor and the vibration exciter, and the vibration waveform is more simple and harmonic through the balance and superposition of force, and is more prone to linear vibration. The amplitude fine-tuning mechanism monitors the working condition of the vibration table through the high-precision displacement sensor, feeds back the working condition to the feedback control system in real time, and directly adjusts the position of the connecting rod through the feedback control system, so that the amplitude of vibration is dynamically fine-tuned, the unidirectional vibration is maintained, and the purpose of adjusting the amplitude is achieved. The frequency of vibration of the vibration exciter can be adjusted by adjusting the frequency converter, and the eccentric block of the vibration motor in the vibration starting mechanism is adjusted, so that the amplitude can be adjusted. The utility model can output high-power and small-amplitude vibration outwards through fewer parts and simpler structural connection, has simple structure, is easy to disassemble and assemble, is convenient to debug and maintain, and is safe and reliable.
Drawings
FIG. 1 is a schematic perspective view of a unidirectional excitation device with adjustable amplitude and frequency;
FIG. 2 is a front view of a unidirectional excitation device with adjustable amplitude and frequency;
FIG. 3 is a schematic diagram illustrating the intelligent control principle of a unidirectional excitation device with adjustable amplitude and frequency;
wherein: 1. a frame; 21. a guide rod cylinder; 22. a guide bar; 23. a guide rod seat; 24. a spring; 25. a vibration plate; 26. a vibration motor; 27. a frequency converter; 31. a bearing seat; 32. a bearing; 33. a shaft sleeve; 34. a shaft; 35. an end cap; 36. a connecting rod; 37. a slider; 38. a screw rod; 39. a high-precision displacement sensor; 310. a servo motor; 311. a PID controller; 312. a vibration table; 313. a comparator.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are provided for illustration purposes only and are not intended to limit the scope of the utility model.
The utility model provides a unidirectional excitation device with adjustable amplitude and frequency, which comprises a frame 1, an oscillation starting mechanism 2 and an amplitude fine adjustment mechanism 3, as shown in figure 1; the vibration starting mechanism 2 comprises a guide rod cylinder 21, a guide rod 22, a guide rod seat 23, a spring 24, a vibration starting plate 25, a vibration motor 26 and a frequency converter 27, wherein the guide rod cylinder 21 is installed on the rack 1, the guide rod 22 is movably connected with the guide rod cylinder 21, the guide rod 22 is installed on the guide rod seat 23, the guide rod seat 23 is installed on the vibration starting plate 25, the spring 24 is sleeved on the guide rod 22, the vibration motor 26 is installed on the vibration starting plate 25, two parts formed by the guide rod cylinder 21, the guide rod 22, the guide rod seat 23 and the spring 24 are respectively arranged and uniformly distributed on the vibration starting plate 25, the vibration motors 26 are symmetrically installed on the vibration starting plate 25 in number of 2, the vibration motors 26 serve as vibration sources, the vibration starting plate 25 is made to vibrate, and the frequency of vibration exciters can be adjusted through the frequency converter 27. The change of the eccentric moment of the vibration motor 26 is realized by adjusting the angle of the eccentric block of the vibration motor 26, so that the vibration amplitude of the vibration plate 25 can be adjusted, when the motor rotates, the vibration motor 26 is connected with the vibration starting plate 25 to cause the vibration of the vibration starting plate 25, the rotation directions of the vibration motors 26 which are symmetrically arranged are opposite, the stress of the whole vibration exciter in the horizontal direction is balanced, the forces in the vertical direction are superposed, and the vibration table 312 outputs unidirectional vibration through the connecting rod 36; the amplitude fine adjustment mechanism 3 comprises a bearing seat 31, a bearing 32, a shaft sleeve 33, a shaft 34, an end cover 35, a connecting rod 36, a sliding block 37, a screw rod 38, a high-precision displacement sensor 39, a servo motor 310, a controller 311, a vibration table 312 and a comparator 313, wherein the high-precision displacement sensor 39 is installed on a machine frame, the bearing seat 31 is installed on a vibration plate 25, the shaft 34 is installed on the bearing seat 31 and the sliding block 37 through the bearing 32, the connecting rod 36 is installed on the shaft 34, the sliding block 37 is in sliding connection with the vibration table 312, the sliding block 37 is in rolling connection with the screw rod 38, the screw rod 38 is connected with the servo motor 310, the comparator 313 and the controller 311 are installed at two symmetrical ends of the vibration table, the high-precision displacement sensor 39 is connected with the comparator 313 through a data transmission line, the comparator 313 is connected with a PID controller 311 through a data transmission line, the PID controller 311 is connected with the servo motor 310 through a data transmission line, the comparator 313, the PID controller 311 and the servo motor 310 are connected in series to form a closed-loop feedback control system, information acquired by the high-precision displacement sensor 39 is transmitted to the comparator 313 through a data transmission line, information processed by the comparator 313 is transmitted to the PID controller 311, signals are analyzed through the PID controller, the rotating speed of the servo motor is adjusted in real time, and therefore the vibration state of the vibration table 312 is controlled, the vibration table 312 is always in the optimal working state, vibration on the vibration plate 25 is transmitted to the vibration table 312 through the symmetrically arranged connecting rods 36, the exciting forces in the vertical direction of the vibration table 312 are superposed due to the symmetrically arranged connecting rods 36, the exciting forces in other directions are balanced, the unidirectionality of the vibration is kept, the purpose of adjusting the amplitude is achieved, and the working state of the vibration device is more flexible and variable.
The vibration adjusting method of the unidirectional excitation device with adjustable amplitude and frequency comprises the following steps:
after the start-up, the vibration motor 26 in the vibration starting mechanism 2 starts operating as a vibration source to give a vibration to the vibration starting plate 25.
Adjusting the frequency: adjusting the frequency of the frequency converter 27 causes the frequency of the vibration motor 26 to be varied and adjusted to the desired operating frequency.
Adjusting the amplitude: the amplitude of vibration of the vibration plate 25 is changed by adjusting the position of the eccentric block in the vibration motor 26 to change the magnitude of the exciting force, the amplitude is adjusted to be closer to the amplitude required by work, the acquired information is transmitted to the comparator 313 in real time by the amplitude fine adjustment mechanism 3 by using the high-precision displacement sensor 39, the information processed by the comparator 313 is transmitted to the PID controller 311, the signal is analyzed and processed by the PID controller 311, the rotating speed of the servo motor 310 is adjusted in real time, and the vibration state of the vibration table 312 is controlled, so that the vibration table 312 is always in the set optimal working amplitude.
The comparator 313 inputs the processed signal to the PID controller 311 through a data transmission line, and the PID controller 311 processes and determines the signal according to the preset motion condition, and sends an instruction to the servo motor 310 to adjust the rotation speed, so as to change the amplitude of the vibration table 312, and the vibration table 312 is always in the set optimal working amplitude.
The foregoing is merely a preferred embodiment of the present invention, and it is intended that the present invention be implemented by those skilled in the art without departing from the technical spirit of the present invention.
Claims (7)
1. The utility model provides an amplitude and one-way excitation device of frequency adjustable which characterized in that: it includes that set gradually from bottom to top: the vibration exciter comprises a machine frame (1), a vibration starting mechanism (2) for providing vibration of the vibration exciter, and an amplitude fine-tuning mechanism (3) for adjusting the amplitude of the vibration exciter; the vibration starting mechanism (2) comprises a vibration motor (26), a vibration starting plate (25) and a spring (24), the vibration motor (26) provides an exciting force to act on the vibration starting plate (25), the vibration starting plate (25) is excited under the action of the spring (24), the amplitude fine adjustment mechanism (3) comprises a bearing seat (31), a connecting rod (36), a sliding block (37), a vibration table (312), a screw rod (38), a comparator (313), a PID controller (311), a servo motor (310) and a high-precision displacement sensor (39), the connecting rod (36) transmits the vibration of the vibration starting plate (25) to the vibration table (312), data measured by the high-precision displacement sensor (39) is transmitted to the comparator (313), the PID controller (311) and the servo motor (310) are connected in series to form a closed-loop feedback control system, and the position of the connecting rod (36) is directly and dynamically adjusted through the closed-loop feedback control system, thereby allowing the amplitude delivered to the vibration table (312) to be dynamically fine-tuned.
2. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 1, wherein: the vibration starting mechanism (2) is composed of a guide rod barrel (21), a guide rod (22), a guide rod seat (23), a spring (24), a vibration starting plate (25), a vibration motor (26) and a frequency converter (27), wherein the guide rod barrel (21) is installed on the rack (1), the guide rod (22) is movably connected with the guide rod barrel (21), the guide rod (22) is installed on the guide rod seat (23), the guide rod seat (23) is installed on the vibration starting plate (25), the spring (24) is sleeved on the guide rod (22), and the vibration motor (26) is installed on the vibration starting plate (25).
3. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 2, wherein: the guide rod cylinder (21), the guide rod (22), the guide rod seat (23) and the spring (24) are respectively provided with at least two vibration starting plates (25) which are uniformly arranged.
4. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 2, wherein: the vibration motors (26) are even in number and are uniformly and symmetrically arranged on the vibration starting plate (25).
5. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 2, wherein: the vibration motor (26) is a vibration source.
6. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 1, wherein: the amplitude fine adjustment mechanism (3) consists of a bearing seat (31), a bearing (32), a shaft sleeve (33), a shaft (34), an end cover (35), a connecting rod (36), a sliding block (37), a screw rod (38), a high-precision displacement sensor (39), a servo motor (310), a PID controller (311), a vibration table (312) and a comparator (313), wherein the high-precision displacement sensor (39) is installed on a rack, the bearing seat (31) is installed on a vibration starting plate (25), the shaft (34) is installed on the bearing seat (31) and the sliding block (37) through the bearing (32), the connecting rod (36) is installed on the shaft (34), the sliding block (37) is in sliding connection with the vibration table (312), the sliding block (37) is in rolling connection with the screw rod (38), the screw rod (38) is connected with the servo motor (310), the comparator (313) and the controller (311) are installed at two ends of the vibration table, the high-precision displacement sensor (39) is connected with the comparator (313) through a data transmission line, the comparator (313) is connected with the PID controller (311) through the data transmission line, and the PID controller (311) is connected with the servo motor (310) through the data transmission line.
7. The unidirectional excitation device with adjustable amplitude and frequency as claimed in claim 6, wherein: the connecting rods (36) are even in number and are uniformly and symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122276291.5U CN215954157U (en) | 2021-09-20 | 2021-09-20 | Amplitude and frequency adjustable one-way excitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122276291.5U CN215954157U (en) | 2021-09-20 | 2021-09-20 | Amplitude and frequency adjustable one-way excitation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215954157U true CN215954157U (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122276291.5U Expired - Fee Related CN215954157U (en) | 2021-09-20 | 2021-09-20 | Amplitude and frequency adjustable one-way excitation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215954157U (en) |
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2021
- 2021-09-20 CN CN202122276291.5U patent/CN215954157U/en not_active Expired - Fee Related
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Granted publication date: 20220304 |