CN211028823U - Controllable supersound surface rolling device of static pressure - Google Patents
Controllable supersound surface rolling device of static pressure Download PDFInfo
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- CN211028823U CN211028823U CN201921764464.4U CN201921764464U CN211028823U CN 211028823 U CN211028823 U CN 211028823U CN 201921764464 U CN201921764464 U CN 201921764464U CN 211028823 U CN211028823 U CN 211028823U
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- rolling head
- static pressure
- rolling
- sensor
- electromagnet
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Abstract
The utility model relates to a controllable supersound surface rolling device of static pressure, the planar principle is confirmed according to two points confirm a straight line, two crossing straight lines to the method, detects through infrared displacement sensor, utilizes linear fitting and the method of asking for the mean value, realizes treating the survey of processing work piece surface levelness to the planning of static pressure is realized to the realization. The device adjusts the magnetic force between the electromagnet and the permanent magnet by controlling the current passing through the electromagnet, so as to adjust and control the static pressure. The system composed of the electromagnet and the permanent magnet belongs to a flexible system, and when the flatness of the machined surface changes slightly, the static pressure can be automatically maintained to be stable. In addition, the rolling head and the rolling head mounting shell adopt homopolar permanent magnets, so that the position of the rolling head can be kept relatively stable, and the friction between the rolling head and the rolling head mounting shell is reduced while the heat dissipation is increased. The utility model has the advantages of simple structure, fast reaction speed, lower requirement on the levelness of the processing surface and higher processing quality.
Description
Technical Field
The utility model relates to a metal surface reinforces the field, in particular to controllable supersound surface rolling device of static pressure.
Background
As one of the surface strengthening technologies, ultrasonic surface rolling can effectively improve the flatness of the surface of a material, enhance the surface microhardness of the material, generate residual compressive stress, and simultaneously change the microstructure of the surface layer of the material, thereby effectively improving the wear resistance and the fatigue resistance of the material. In the ultrasonic rolling process, the static pressure is an important factor influencing the surface processing precision, and a good surface strengthening effect can be obtained by proper static pressure. The material has different surface planeness due to inevitable bulges or pits in pretreatment processing, the currently used ultrasonic rolling device cannot well respond to the change of static pressure and maintain the stability of the static pressure, when the bulges exist on the surface of the material, the static pressure can be increased, and further the mechanical vibration of a rolling head is inhibited, so that the friction force between the rolling head and the material is increased, and the surface of the material is easy to drop or scratch; when the material is provided with the pits, the static pressure is reduced, the plastic deformation is difficult to generate on the surface of the material or the depth of the plastic deformation is low, and the surface performance of the material is difficult to effectively improve. Meanwhile, small deviation always exists in the operation process, and the static pressure changes correspondingly when the surface to be processed is placed and inclined. Nowadays, high-tech technologies such as aerospace and the like are rapidly developed, requirements for mechanical parts are higher and higher, surface quality of key parts is improved through ultrasonic surface rolling, and the method has important significance for increasing safe operation time of the key parts. Therefore, the adjustment of the static pressure and the stabilization of the static pressure have important significance in the ultrasonic rolling system.
In addition, the rolling head is in a high-speed vibration state, friction exists inevitably between the rolling head and the rolling head mounting shell, abrasion is caused to the friction surface of the rolling head, a large amount of friction heat is generated, and the service life of the rolling head and the rolling head mounting shell is seriously influenced. In order to keep the rolling uniformity, the positions of the rolling head and the rolling head mounting shell are relatively fixed. In general, if the gap between the rolling head and the rolling head mounting shell is large, the heat dissipation is good, but the relative position between the rolling head and the rolling head mounting shell is easy to change when the machined surface is not flat, and if the gap between the rolling head and the rolling head mounting shell is small, the relative position between the rolling head and the rolling head mounting shell is fixed, but the heat dissipation is poor and the friction is severe. The rolling head and the rolling head mounting shell adopt homopolar permanent magnets, so that the position of the rolling head relative to the rolling head mounting shell can be kept fixed while the gap between the rolling head and the rolling head mounting shell is increased to increase heat dissipation, friction can be avoided, the service life of the rolling head and the rolling head mounting shell is greatly prolonged, and the quality of ultrasonic rolling parts is greatly improved. Therefore, it is also of great importance to reduce wear on the stitching heads, to increase heat dissipation, while keeping the relative positions of the stitching heads stable in an ultrasonic stitching system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a controllable supersound surface rolling device of static pressure not only can provide the static pressure of supersound roll extrusion in-process, can also make the pre-adjustment to the static pressure size according to the slope degree of treating the machined surface, adjusts in real time according to the actual plane degree on material surface, guarantees the processing property on material surface. In addition, the system consisting of the electromagnet and the permanent magnet belongs to a flexible system, so that the response speed is high, and the static pressure is controlled and adjusted more accurately. Meanwhile, the rolling head and the rolling head shell adopt the principle that like poles of magnets repel each other, so that the rolling head can be stabilized, friction is reduced, and heat dissipation is increased.
The technical scheme for implementing the purpose of the invention is as follows: an ultrasonic surface rolling device with controllable static pressure is characterized by comprising an electromagnet, a permanent magnet, a baffle, a pressure sensor, an ultrasonic transducer, an amplitude transformer, a rolling head, an outer sleeve rear cover, an outer sleeve, an amplitude transformer guide sleeve, a rolling head mounting shell, a sensor retainer, a fastening screw, an infrared displacement sensor and a control system, wherein the electromagnet is fixed on the outer sleeve rear cover; the outer sleeve, the outer sleeve rear cover, the electromagnet, the amplitude transformer guide sleeve and the rolling head mounting shell are in a fixed state, and the permanent magnet, the baffle, the pressure sensor, the ultrasonic transducer and the amplitude transformer are in a synchronous floating state; the infrared displacement sensor is fixed on the sensor holder, and the sensor holder is fixed on the outer sleeve through a fastening screw.
The magnetic force between the electromagnet and the permanent magnet provides static pressure and maintains the stability of the static pressure.
The distance between the electromagnet and the permanent magnet can be adjusted, and then the magnetic force coefficient between the electromagnet and the permanent magnet is changed.
The outer sleeve, the outer sleeve rear cover, the baffle, the amplitude transformer guide sleeve and the like are all made of non-ferromagnetic materials.
The contact part of the sensor holder and the outer sleeve is made of elastic plastic materials so as to enhance the reliability of connection.
The shoulder of the sensor holder is grooved and can rotate to adjust the angle.
When the infrared displacement sensor is installed, the infrared displacement sensor is symmetrically arranged along the symmetrical axis of the sensor holder, and scales capable of displaying the linear distance between the two sensors are marked on the sensor holder according to angles.
The control system adopts neural network PID control, uses BP algorithm, and utilizes the suspension gap between the electromagnet and the permanent magnet as experimental training data, so that the overshoot is small, the rigidity is large, and the robustness is better.
The rolling head and the rolling head mounting shell adopt homopolar permanent magnets, and the rolling head is always positioned in the center of an inner hole of the rolling head mounting shell.
Furthermore, the utility model provides a rolling method includes: the infrared displacement sensors are two in number, are fixed on the sensor retainer and can be adjusted in position according to the size of a workpiece.
The infrared displacement sensor can adjust the position according to the size of a workpiece, two sensors simultaneously move to cover the whole workpiece plane along the X-axis or Y-axis direction of a machine tool or any one of the sensors moves to cover the whole workpiece plane along the X-axis and Y-axis directions of the machine tool respectively according to actual conditions before formal machining, a control system uniformly records parameters of each point on a moving track according to a preset program, linear fitting is respectively carried out in the X-axis and Y-axis directions of the machine tool, the levelness of the workpiece is obtained through analysis, and the change range of static pressure is planned.
Compared with the prior art, the utility model, it is showing the advantage and is:
1. the static pressure is provided by the magnetic force between the electromagnet and the permanent magnet, the structure is simple, and the response speed is high.
2. The system composed of the electromagnet and the permanent magnet belongs to a flexible system, and the elastic coefficient is adjustable, so that the stability of static pressure can be automatically maintained.
3. The workpiece mounting requirement is reduced, the levelness of the surface to be processed is detected in advance, the static pressure range is set, the pressure sensor detects the static pressure in real time, whether the static pressure is in the preset range or not is judged, the accuracy is higher, and the automation degree is higher.
4. The relative positions of the rolling head and the rolling head mounting shell are kept stable, abrasion is reduced, heat dissipation is increased, the service lives of the rolling head and the rolling head mounting shell are prolonged, and the processing quality of parts is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is a schematic view of the structure of the flatness detecting portion of the processing surface of the present invention
FIG. 3 is a top view of the sensor holder of the present invention
FIG. 4 is the movement path diagram of the infrared displacement sensor of the present invention
In the figure: 1. an outer sleeve rear cap; 2. an outer sleeve; 3. an electromagnet; 4. a permanent magnet; 5. a baffle plate; 6. a pressure sensor; 7. An ultrasonic transducer; 8. an amplitude transformer; 9. a guide sleeve of the amplitude transformer; 10. a rolling head mounting shell; 11. rolling a head; 12. an infrared displacement sensor; 13. fastening screws; 14. a sensor holder; 15. a control system; 16. a sliding groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
An ultrasonic surface rolling device with controllable static pressure is disclosed, as shown in fig. 2 and 3, an infrared displacement sensor 12 is uniformly fixed on a sensor holder 14 by using two fastening screws 13, before operation, the shoulder of the sensor holder 14 is firstly rotated to adjust the position of a sliding groove 16, if a workpiece is larger, as shown in fig. 4(a), two sensors can be simultaneously positioned above the surface of the workpiece, the position of the infrared displacement sensor 12 is adjusted, so that the two infrared displacement sensors 12 are both positioned right above the surface to be processed, and the workpiece is moved to cover the whole workpiece plane along the X-axis (Y-axis) direction of a machine tool, if the workpiece is smaller, as shown in fig. 4(b), namely two sensors cannot be simultaneously positioned above the surface of the workpiece, the position of the infrared displacement sensor 12 is adjusted, so that one of the two sensors is positioned right above the surface to be processed, and the workpiece is moved to cover the whole workpiece plane along the X, the control system uniformly records parameters of each point on the moving track according to a preset program, and respectively performs linear fitting in the X-axis direction and the Y-axis direction of the machine tool, so as to analyze and obtain the levelness of the workpiece and plan the change range of the static pressure. For example, when the processing surface inclines upward relatively along the working direction, the load pressure will also increase, the current introduced into the electromagnet 3 should be reduced correspondingly according to the levelness of the processing surface, the magnetic force is weakened, and further the static pressure is maintained stable; when the working direction relative downward sloping of working face is followed, load pressure diminishes, lets in the electric current and should make corresponding increase according to the levelness of working face in the electro-magnet 3, and the magnetic force reinforcing, and then makes the static pressure maintain stably. The details are as follows: the initial position of the rolling head is taken as the origin of coordinates, the number n of sampling points can be obtained by counting by a control system and can also be manually input, and the distance of the sampling points can be manually input and can also be automatically controlled by a program.
In the first case: two sensors a and b are adopted, and every distance d1Taking a sampling point, the distance between two sensors is 2d2The measured values are respectively a1,a2,……,anAnd b1,b2,……,bn；
Respectively calculate ai+biAverage value z ofi(i ═ 1,2, … …, n), a set of data points (d) is obtained1,0,z1)(2d1,0,z2)…… (nd1,0,zn) Calculating by least square method to obtain a linear equation ①, respectively
A set of data points ((n +1) d) was obtained1/2,d2,Z1)((n+1)d1/2,-d2,Z2) The linear equation ② is obtained by calculation, and the plane equation can be obtained by simultaneous equation ①②.
In the second case: only a sensor c is adopted, the distances of sampling points along the X-axis direction and the Y-axis direction are d, and the measured numerical values are c respectively1,c2,……,cnAnd f1,f2,……,fn；
Respectively obtain a set of data points (d,0, c)1)(2d,0,c2)……(nd,0,cn) Using least squares to calculate a linear equation ③, and a set of data points (0, d, f)1)(0,2d,f2)……(0,nd,fn) A linear equation ④ is obtained by adopting the least square method, and a plane equation can be obtained by using a simultaneous equation ③④.
And then calculating out the flatness and planning the static pressure.
As shown in fig. 1, the pressure sensor 6 measures the magnitude of the static pressure, transmits a signal to the control system, and changes the magnitude of the magnetic force by controlling the magnitude of the current introduced into the electromagnet 3, thereby changing the static pressure required by rolling or maintaining the stability of the static pressure. For example, when the machined surface has a bulge, the load pressure is increased, the signal of the pressure sensor 6 is changed, the control system 15 controls the current introduced into the electromagnet 3 to be correspondingly reduced, the magnetic force is weakened, and the static pressure is kept stable; when the machined surface is provided with a pit, the load pressure is reduced, the signal of the pressure sensor 6 is changed, the control system 15 controls the current introduced into the electromagnet 3 to be correspondingly reduced, the magnetic force is weakened, and then the static pressure is kept stable.
As shown in fig. 1, the rolling head 11 and the rolling head mounting shell 10 employ homopolar electromagnets, and according to the principle that homopolar repulsion of magnets occurs, the rolling head 11 may be located at the center of the inner hole of the rolling head mounting shell 10 and does not contact with each other, so that friction force therebetween is greatly reduced, and heat dissipation is increased.
The system composed of the electromagnet 3, the permanent magnet 4, the rolling head 11 and the rolling head mounting shell 10 belongs to a flexible system, and can automatically maintain the stability of static pressure within a certain range.
The foregoing are only some embodiments of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a controllable supersound surface rolling device of static pressure which characterized in that: the device comprises an electromagnet, a permanent magnet, a baffle, a pressure sensor, an ultrasonic transducer, an amplitude transformer, a rolling head, an outer sleeve rear cover, an outer sleeve, an amplitude transformer guide sleeve, a rolling head mounting shell, a sensor retainer, a fastening screw, an infrared displacement sensor and a control system, wherein the electromagnet is fixed on the outer sleeve rear cover; the outer sleeve, the outer sleeve rear cover, the electromagnet, the amplitude transformer guide sleeve and the rolling head mounting shell are in a fixed state, and the permanent magnet, the baffle, the pressure sensor, the ultrasonic transducer and the amplitude transformer are in a synchronous floating state; the infrared displacement sensor is fixed on the sensor holder, and the sensor holder is fixed on the outer sleeve through a fastening screw.
2. The ultrasonic surface rolling device with controllable static pressure as claimed in claim 1, wherein: the infrared displacement sensors are two in number, are fixed on the sensor retainer and can be adjusted in position according to the size of a workpiece.
3. The ultrasonic surface rolling device with controllable static pressure as claimed in claim 1, wherein: when the infrared displacement sensor is installed, the infrared displacement sensor is symmetrically arranged along the symmetrical axis of the sensor holder, and scales capable of displaying the linear distance between the two sensors are marked on the sensor holder according to angles.
4. The ultrasonic surface rolling device with controllable static pressure as claimed in claim 1, wherein: the rolling head and the rolling head mounting shell adopt homopolar permanent magnets, and the rolling head is always positioned in the center of an inner hole of the rolling head mounting shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921764464.4U CN211028823U (en) | 2019-10-21 | 2019-10-21 | Controllable supersound surface rolling device of static pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921764464.4U CN211028823U (en) | 2019-10-21 | 2019-10-21 | Controllable supersound surface rolling device of static pressure |
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| Publication Number | Publication Date |
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| CN211028823U true CN211028823U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921764464.4U Expired - Fee Related CN211028823U (en) | 2019-10-21 | 2019-10-21 | Controllable supersound surface rolling device of static pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846640A (en) * | 2020-12-15 | 2021-05-28 | 贵州博泰自动化科技有限公司 | Pressure checking method and machining equipment |
-
2019
- 2019-10-21 CN CN201921764464.4U patent/CN211028823U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846640A (en) * | 2020-12-15 | 2021-05-28 | 贵州博泰自动化科技有限公司 | Pressure checking method and machining equipment |
| CN112846640B (en) * | 2020-12-15 | 2023-06-02 | 贵州博泰自动化科技有限公司 | Pressure checking method and machining equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 Termination date: 20211021 |