CN115058585A - Ultrasonic cavitation impact reduction and homogenization method for residual stress of complex curved surface component - Google Patents
Ultrasonic cavitation impact reduction and homogenization method for residual stress of complex curved surface component Download PDFInfo
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- CN115058585A CN115058585A CN202210752091.9A CN202210752091A CN115058585A CN 115058585 A CN115058585 A CN 115058585A CN 202210752091 A CN202210752091 A CN 202210752091A CN 115058585 A CN115058585 A CN 115058585A
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Abstract
The application provides a method for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface component, which comprises the steps of arranging a container with a liquid medium in the container, installing an ultrasonic transducer on the side wall of the container, and fixing an amplitude transformer immersed in the liquid medium at one end of the ultrasonic transducer facing the inside of the container; the method comprises the following steps: clamping the complex curved surface member by a manipulator, immersing a part to be regulated of the complex curved surface member in a liquid medium in the container, and controlling the manipulator to keep the part to be regulated and controlled and the amplitude transformer within a set distance range; and generating high-intensity ultrasonic waves through the ultrasonic energy conversion device according to the residual stress value of the part to be regulated, transmitting the ultrasonic waves to the part to be regulated through the amplitude transformer, and reducing and homogenizing the residual stress of the part to be regulated.
Description
Technical Field
The application relates to the technical field of material performance research, in particular to a method for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface component.
Background
For a component with a complex structure and a high precision, which is required in a machining process, particular attention should be paid to stresses generated on the surface and the inside of the component during machining, casting, welding, cold working, heat treatment, and the like. If the surface and internal residual stress of the component is not properly controlled, the component can deform and even crack due to stress release in the later use process, so that the precision and normal use of the component are influenced. Therefore, stress control is also a very important part of the manufacturing and service processes of complex high precision components. Common stress reduction methods include a natural aging method, a vibration aging method, a thermal aging method (heat treatment), an ultrasonic impact method (Hakken energy aging method), a contact high-energy sound beam method, and the like.
The natural aging method is simple, but takes too long time and has low efficiency. The vibration aging enables the component to generate resonance through the vibration exciter so as to relax and relieve the internal stress of the material, but the method is not suitable for the components with complicated structures and thin walls. Due to different shapes of the components, the method has high requirements on the technical level of operators and complex process parameter setting, and if excitation points and parameters are improperly set, periodic fatigue action and even damage to the components can be caused by abnormal resonance modes. Thermal aging, that is, if the process parameters of annealing heat treatment are not properly selected in the processes of heating, heat preservation and cooling, the effect of reducing the stress can not be achieved, and even the stress deformation can be increased. Ultrasonic impact methods can cause damage to the surface of the component and are not suitable for components with complex thin walls of surface contours. The contact type high-energy sound beam regulation and control method is also not suitable for components with complex profiles, a special sound wedge block needs to be designed for coupling, and the manufacturing cost is high. In order to ensure that the stress of the thin-wall and weak-rigidity member with a complex structure can be reduced so as to improve the stability and precision of the member, an effective mode needs to be found for reducing the residual stress of the member with the complex curved surface.
Disclosure of Invention
In view of the above, the present application provides a method for reducing and homogenizing residual stress of a complex curved surface member by ultrasonic cavitation impact, which utilizes the cavitation effect of ultrasonic waves in liquid to reduce and homogenize the residual stress of a part to be regulated and controlled of the complex curved surface member by the ultrasonic cavitation impact generated by the ultrasonic waves in a liquid medium, so as to improve the precision and stability of the complex curved surface member.
In order to achieve the purpose, the application provides a method for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface component, which comprises the steps of arranging a container filled with a liquid medium inside, installing an ultrasonic transducer on the side wall of the container, and fixing an amplitude transformer immersed in the liquid medium at one end of the ultrasonic transducer facing the inside of the container; the method comprises the following steps:
clamping the complex curved surface member by a manipulator, immersing a part to be regulated of the complex curved surface member in a liquid medium in the container, and controlling the manipulator to keep the part to be regulated and controlled and the amplitude transformer within a set distance range;
and generating high-intensity ultrasonic waves through the ultrasonic energy conversion device according to the residual stress value of the part to be regulated, transmitting the ultrasonic waves to the part to be regulated through the amplitude transformer, and reducing and homogenizing the residual stress of the part to be regulated.
According to the method, the container filled with the liquid medium is arranged, the ultrasonic transducer is arranged on the side wall of the container and used for sending high-intensity ultrasonic waves into the liquid medium, the part to be regulated and controlled of the complex curved surface component is immersed into the liquid medium through the mechanical arm, the part to be regulated and controlled of the complex curved surface component is radiated through ultrasonic cavitation impact by utilizing the cavitation effect of the ultrasonic waves in the liquid medium, the superposition of the alternating dynamic stress and the residual stress applied by the residual stress concentration area is realized, and finally, the ultrasonic cavitation impact reduction and homogenization of the residual stress of the complex curved surface component in the whole or at the designated position are completed, so that the precision and the stability of the complex curved surface component are improved.
Optionally, the method further includes:
formulating a mechanical arm scanning track according to the three-dimensional model of the complex curved surface component;
according to the scanning track of the manipulator, the manipulator clamps the complex curved surface member, and the part to be regulated of the complex curved surface member is sequentially immersed in a liquid medium and kept within a set distance range with the amplitude transformer;
and according to the magnitude of the residual stress value of the part to be regulated and controlled, sequentially reducing and homogenizing the residual stress of the part to be regulated and controlled by adjusting the high-intensity ultrasonic waves.
According to the method, a manipulator scanning track is formulated according to the three-dimensional model of the complex curved surface component, the component to be regulated and controlled is clamped by the manipulator, the position of the component to be regulated and controlled is accurately adjusted by accurately controlling the manipulator, and the precision and the accuracy of the residual stress ultrasonic cavitation impact reduction and homogenization process are ensured.
Optionally, the reducing and homogenizing the residual stress of the part to be regulated includes:
and through the ultrasonic cavitation impact generated by the high-intensity ultrasonic waves in the liquid medium, the residual stress on the surface of the part to be regulated is reduced and homogenized.
Therefore, by utilizing the cavitation effect of the high-intensity ultrasonic waves in the liquid, the residual stress on the surface of the part to be regulated and controlled of the complex curved surface component can be reduced and homogenized through the ultrasonic cavitation impact generated by the high-intensity ultrasonic waves in the liquid medium.
Optionally, the method further includes:
and sending the high-intensity ultrasonic waves to the part to be regulated and controlled by adjusting the frequency of the high-intensity ultrasonic waves and taking the liquid medium as a coupling medium, and reducing and homogenizing residual stress in the part to be regulated and controlled.
Therefore, the frequency of the high-intensity ultrasonic waves is adjusted to be other high-frequency resonant frequencies, the ultrasonic waves cannot generate a cavitation effect in water but generate high-energy sound beams under the frequencies, then the liquid medium is used as a coupling medium to transmit the high-energy sound beams to the part to be regulated, and the reduction and homogenization of residual stress in the part to be regulated can also be realized.
Optionally, the ultrasonic transducer device includes:
the piezoelectric material device is used for exciting elastic waves, and the electroacoustic transducer connected with the piezoelectric material device, the magnetoelastic wave device connected with the magnetoelastic wave device or the photoelastic wave device connected with the magnetoelastic wave device, and the photoacoustic transducer connected with the magnetoelastic wave device.
Optionally, the liquid medium includes any one of the following:
water, oil, water-oil mixtures containing additives, semi-solid flow media, and colloidal flow media.
Optionally, the set distance ranges from 0.5mm to 1 mm.
From the above, the vertical distance between the front end of the horn and the surface of the member is kept at about 0.5mm to 1mm, so that the cavitation effect is generated.
Optionally, the front end of the horn is a concave spherical surface or a concave cylindrical surface, so as to focus the high-intensity ultrasonic wave.
Therefore, the front end of the amplitude transformer can be designed into a concave spherical surface point focusing form or a concave cylindrical surface line focusing form, and the incident position and the incident direction of the ultrasonic wave are adjusted by means of a mechanical arm, so that the almost any position of the sound beam focusing point in the curved surface component can be realized.
Optionally, a sealing medium is disposed at a connection between the ultrasonic transducer and the sidewall of the container.
Therefore, a sealing medium is arranged at the joint of the ultrasonic transducer and the side wall of the container, and the liquid medium is prevented from flowing out of the side wall of the container.
Optionally, the temperature of the liquid medium is maintained at 25 degrees.
Therefore, when the residual stress of the complex curved surface component is regulated, the temperature of the liquid medium should be kept at about 25 ℃ of room temperature, so as to avoid the surface quality loss of the component or reduce the loss rate.
These and other aspects of the present application will be more readily apparent in the following description of the embodiment(s).
Drawings
FIG. 1 is a schematic diagram of an apparatus for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface member according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of a method for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface component according to an embodiment of the present application.
It should be understood that the dimensions and forms of the various blocks in the block diagrams described above are for reference only and should not be construed as exclusive of the embodiments of the present application. The relative positions and the inclusion relations among the blocks shown in the structural schematic diagram are only used for schematically representing the structural associations among the blocks, and do not limit the physical connection manner of the embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the application provides an ultrasonic cavitation impact reduction and homogenization method for residual stress of a complex curved surface component, and the reduction and homogenization of the residual stress of the complex curved surface component are realized by utilizing an ultrasonic cavitation effect and a high-energy sound beam under the condition of assistance of a mechanical arm. And (2) formulating a mechanical arm scanning track according to the three-dimensional model of the complex curved surface component, clamping the complex curved surface component in a liquid medium or a soft medium by a mechanical arm, radiating the surface and the inside of the specified position of the complex curved surface component by using shock waves, micro jet flows or high-energy sound beams generated by a high-energy ultrasonic transducer, realizing the superposition of the alternating dynamic stress and the residual stress applied by the residual stress concentration area, and finally finishing the ultrasonic cavitation impact reduction and homogenization of the residual stress of the complex curved surface component as a whole or at the specified position.
As shown in FIG. 1, the embodiment of the application provides a device for eliminating and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface member, which is used for executing the method for eliminating and homogenizing residual stress ultrasonic cavitation impact of the complex curved surface member provided by the embodiment of the application. Referring to fig. 1, the apparatus provided in this embodiment includes: the ultrasonic transducer comprises a container 100, a liquid medium 101, an ultrasonic transducer 200, a horn 201 and a manipulator 300;
the container 100 may be a square-trough container, the liquid medium 101 is provided in the container, the manipulator 300 is used for holding the complex curved surface member 400 and suspending the complex curved surface member in the liquid medium 101, the ultrasonic transducer 200 is fixedly arranged on the sidewall of the container 100, one end of the ultrasonic transducer is connected with an amplitude transformer 201 immersed in the liquid medium 101, the ultrasonic transducer 200 is controlled to convert the input electric power into mechanical power (ultrasonic wave), the amplitude transformer 201 connected with the ultrasonic transducer is used for amplifying the particle displacement of the mechanical vibration, and the ultrasonic energy is focused on a smaller area to realize energy focusing.
In some embodiments, the ultrasonic transducing device 200 may employ a piezoelectric material device capable of exciting an elastic wave and an electroacoustic transducer connected thereto, a magnetoelastic wave device and a magnetoelastic wave device connected thereto, or a photoelastic wave device and a photoacoustic transducer connected thereto, so as to generate a high-intensity ultrasonic wave, which has a higher sound intensity than an ultrasonic wave of a general intensity, and can increase the maximum radius volume that a cavitation bubble can reach, so as to obtain a shock wave and a micro shock wave of a larger amplitude, and can make a stress response generated on the surface of a member to be regulated have a higher intensity, thereby achieving the purpose of improving the reduction and homogenization capabilities. The amplitude transformer 201 is made of a high-strength high-hardness metal material, such as titanium alloy, the front end of the amplitude transformer can be designed into a concave spherical surface point focusing mode or a concave cylindrical surface line focusing mode, and the incident position and the incident direction of ultrasonic waves are adjusted by means of a manipulator, so that the sound beam focusing point can be almost at any position in the curved surface member. Through the amplitude transformer 201 of the embodiment, the area for transmitting ultrasonic waves can be enlarged, and the energy of the ultrasonic waves can be rapidly expanded, so that the energy of the ultrasonic waves output by the amplitude transformer in the same time can be increased, and the reduction and homogenization of residual stress can be completed more efficiently.
In some embodiments, the manipulator 300 may be a six-degree-of-freedom manipulator, before the residual stress of the complex curved surface member is regulated, a manipulator scanning track may be formulated according to a three-dimensional model of the complex curved surface member, the complex curved surface member is clamped by the six-degree-of-freedom manipulator, a part to be regulated of the complex curved surface member is immersed in a liquid medium, an ultrasonic wave is transmitted into the liquid medium by controlling an ultrasonic wave transducer and a horn, and an ultrasonic wave transmitting port of the horn faces the part to be regulated of the complex curved surface member, so that the ultrasonic wave is directionally and directly emitted into a liquid region between a rod end surface of the horn and the part to be regulated. In the embodiment, the position to be regulated and controlled of the complex curved surface member is adjusted by controlling the pose of the manipulator, so that the output end of the amplitude transformer can be ensured to face the position to be regulated and controlled and keep a set distance range with the surface of the position to be regulated and controlled by controlling the manipulator when the position to be regulated and controlled of the complex curved surface member is changed. In some embodiments, two or more manipulators may work cooperatively to regulate and control two or more sides of the complex curved surface member.
In some embodiments, the liquid medium 101 may be water, oil, a water-oil mixture containing additives, a semi-solid flow medium, and a colloidal flow medium. When the residual stress of the complex curved surface component is regulated, the temperature of the liquid medium is kept to be about 25 ℃ at room temperature, so that the surface quality loss of the component is avoided, or the loss rate is reduced.
The working principle of the device for eliminating and homogenizing the residual stress ultrasonic cavitation impact of the complex curved surface member is described in detail below with reference to a flow chart of a method for eliminating and homogenizing the residual stress ultrasonic cavitation impact of the complex curved surface member as shown in fig. 2. Referring to fig. 1, the method includes:
s101: detecting and recording the residual stress value of the part to be regulated of the complex curved surface component;
and adjusting the frequency of the high-intensity ultrasonic wave in the subsequent step according to the residual stress value by detecting the residual stress value of the part to be regulated and controlled of the complex curved surface component.
S102: formulating a mechanical arm scanning track according to the three-dimensional model of the complex curved surface component;
before the residual stress of the complex curved surface component is regulated and controlled, a mechanical arm scanning track can be formulated according to a three-dimensional model of the complex curved surface component, the complex curved surface component is clamped by the mechanical arm, the parts to be regulated and controlled of the complex curved surface component are sequentially immersed into a liquid medium according to the formulated scanning track, and the residual stress of the parts to be regulated and controlled is sequentially regulated and controlled by high-intensity ultrasonic waves sent by an ultrasonic transducer.
S103: clamping the complex curved surface component by a manipulator, and immersing the part to be regulated in a liquid medium;
according to the formulated mechanical arm scanning track, the complex curved surface component is clamped by the mechanical arm, the part to be regulated is immersed in the liquid medium according to the scanning track, and the vertical distance between the part to be regulated of the complex curved surface component and the front end of the amplitude transformer is kept between 0.5mm and 1mm by controlling the mechanical arm, so that the cavitation effect can be generated. And the vertical distance between the part to be regulated and controlled of the complex curved surface component and the front end of the amplitude transformer is controlled to be kept within the range of 0.5mm to 1mm, so that the cavitation bubbles can be uniformly and stably broken on the surface of the part to be regulated and controlled, the released micro shock waves and shock waves can be broken and extinguished to the greatest extent by the cavitation bubbles, and the residual stress on the surface of the component can be effectively reduced and homogenized.
S104: starting an ultrasonic transducer and an amplitude transformer, and predicting regulation and control time according to the residual stress value of the part to be regulated and controlled;
by starting the ultrasonic wave transducer fixed on the side wall of the container and starting the amplitude transformer which is immersed in the liquid medium and faces the part to be regulated, the regulation time is predicted according to the residual stress value of the part to be regulated, which is detected in the step S101, and the ultrasonic wave transducer is controlled to generate high-intensity ultrasonic waves and send the high-intensity ultrasonic waves to the part to be regulated. The estimated regulation and control time is set according to the residual stress value of the part to be regulated and controlled of the complex curved surface component, the regulation and control time is guaranteed to be accurate as much as possible, the regulation and control time cannot be too long when the residual stress of the complex curved surface component is regulated and controlled, the regulation and control time of each point position is not more than 30 seconds for the component with lower strength and hardness, and the regulation and control time of each point position is not more than 15 minutes for the component with higher strength and hardness.
In the embodiment, the working frequency of the high-intensity ultrasonic waves generated by the ultrasonic wave transducer is controlled within the range of 15-30 kHz, the high-intensity ultrasonic waves are sent to the liquid medium by utilizing the cavitation phenomenon of the ultrasonic waves in the liquid, the liquid medium is driven by the high-intensity ultrasonic waves, so that tiny bubbles and bubble nucleuses can be generated inside the liquid medium in the container, the process that the tiny bubbles and bubble nucleuses generate oscillation, growth, expansion, contraction and collapse under the action of the ultrasonic waves is the specific expression of ultrasonic cavitation, in the ultrasonic cavitation process, the cavitation bubbles can generate micro shock waves when being rapidly closed and broken, and the micro shock waves enable the local part to have high pressure and finally act on the part to be regulated of the complex curved surface component. Besides the micro fundamental wave, when cavitation bubbles collapse to the minimum size and begin to rebound, shock waves can be generated, and compared with micro shock waves, the shock waves have higher pressure intensity and finally act on the part to be regulated and controlled of the complex curved surface component. The method is characterized in that a strong pressure field formed by micro shock waves and shock waves jointly acts on a part to be regulated of the complex curved surface component and is superposed with the residual stress of the part to be regulated, and when the superposed stress reaches or exceeds the yield limit of the part to be regulated, the surface of the part to be regulated of the complex curved surface component generates microscopic plastic deformation, so that the residual stress of the surface of the part to be regulated is reduced and homogenized. Because the strength (generally about three to forty megapascals) of the pressure field generated by the micro shock wave and the shock wave is far less than that of a contact type high-energy sound beam regulation method, the pressure field with the strength level provided by the embodiment can ensure that the residual stress is reduced and homogenized, meanwhile, the thin-wall structural member and the weak-rigidity structural member are not damaged, and the nondestructive property and the integrity of the thin-wall structural member and the weak-rigidity structural member are ensured.
In some embodiments, the frequency of the high-intensity ultrasonic wave may be adjusted to be other high-frequency resonant frequencies, at which the ultrasonic wave cannot generate a cavitation effect in water but generates a high-energy sound beam, and then the high-energy sound beam is transmitted to the inside of the part to be regulated by using a liquid medium as a coupling medium, so that the residual stress inside the part to be regulated can be reduced and homogenized.
S105: after the expected regulation and control time is reached, the ultrasonic transducer and the amplitude transformer are closed, the complex curved surface component is taken out from the container through controlling the manipulator, and the stress detection is carried out on the part to be regulated and controlled;
s106: repeating the steps until the stress value is not changed any more;
after the ultrasonic cavitation impact and the high-energy sound beam are adopted to regulate and control the residual stress of the part to be regulated and controlled of the complex curved surface component within the set regulation and control time, the complex curved surface component can be taken out from the container through the mechanical arm, the regulated and controlled part to be regulated and controlled is subjected to stress detection, whether the residual stress of the regulated and controlled part reaches a set threshold value is detected, if the residual stress reaches the set threshold value, the regulation and control are not required, and if the residual stress does not reach the set threshold value, the step is adopted to continue to regulate and control the residual stress of the part to be regulated and controlled until the set threshold value is reached.
S107: according to the formulated scanning track of the mechanical arm, clamping the complex curved surface component by the mechanical arm, and regulating and controlling the next part to be regulated and controlled until the regulation and control of all the parts to be regulated and controlled of the complex curved surface component are completed;
according to the formulated manipulator scanning track, the positions to be regulated and controlled of the complex curved surface member are adjusted by controlling the pose of the manipulator, so that when the positions to be regulated and controlled of the complex curved surface member are changed, the output end of the amplitude transformer can be ensured to face the positions to be regulated and controlled and keep a set distance range with the surface of the positions to be regulated and controlled by controlling the manipulator.
In summary, in the embodiment of the present application, the impact wave and the micro jet generated by the ultrasonic cavitation effect impact the part to be regulated of the complex curved surface member, so as to regulate the residual stress on the surface of the part to be regulated; meanwhile, high-energy sound beams are transmitted into the part to be regulated and controlled in a water coupling mode, and the residual stress in the part to be regulated and controlled is regulated and controlled, so that the residual stress of the complex curved surface component is reduced and homogenized, and the precision and the stability of the complex curved surface component are improved.
It should be noted that the embodiments described in this application are only a part of the embodiments of the present application, and not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the above detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The terms "first, second, third and the like" or "module a, module B, module C and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that specific orders or sequences may be interchanged where permissible to effect embodiments of the present application in other than those illustrated or described herein.
In the above description, reference numbers indicating steps do not necessarily indicate that the steps are performed according to the steps, and may include intermediate steps or be replaced by other steps, and the order of the steps may be interchanged before and after the steps, or performed simultaneously, where the case allows.
The term "comprising" as used in the specification and claims should not be construed as being limited to the contents listed thereafter; it does not exclude other elements or steps. It should therefore be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, and groups thereof. Thus, the expression "a device comprising means a and B" should not be limited to a device consisting of only components a and B.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, in the various embodiments of the present application, unless otherwise specified or logically conflicting, terms and/or descriptions between different embodiments have consistency and may be mutually referenced, and technical features in different embodiments may be combined to form new embodiments according to their inherent logical relationships.
It should be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention.
Claims (10)
1. A method for reducing and homogenizing residual stress ultrasonic cavitation impact of a complex curved surface member is characterized in that a container filled with a liquid medium is arranged, an ultrasonic transducer is arranged on the side wall of the container, and an amplitude transformer immersed in the liquid medium is fixed at one end of the ultrasonic transducer facing the inside of the container; the method comprises the following steps:
clamping the complex curved surface member by a manipulator, immersing a part to be regulated of the complex curved surface member in a liquid medium in the container, and controlling the manipulator to keep the part to be regulated and controlled and the amplitude transformer within a set distance range;
and generating high-intensity ultrasonic waves through the ultrasonic energy conversion device according to the residual stress value of the part to be regulated, transmitting the ultrasonic waves to the part to be regulated through the amplitude transformer, and reducing and homogenizing the residual stress of the part to be regulated.
2. The method of claim 1, further comprising:
formulating a mechanical arm scanning track according to the three-dimensional model of the complex curved surface component;
according to the scanning track of the manipulator, the manipulator clamps the complex curved surface member, and the part to be regulated of the complex curved surface member is sequentially immersed in a liquid medium and kept within a set distance range with the amplitude transformer;
and according to the magnitude of the residual stress value of the part to be regulated and controlled, sequentially reducing and homogenizing the residual stress of the part to be regulated and controlled by adjusting the high-intensity ultrasonic waves.
3. The method according to claim 1 or 2, wherein the reducing and homogenizing of the residual stress of the site to be conditioned comprises:
and through the ultrasonic cavitation impact generated by the high-intensity ultrasonic waves in the liquid medium, the residual stress on the surface of the part to be regulated is reduced and homogenized.
4. The method of claim 3, further comprising:
and sending the high-intensity ultrasonic waves to the part to be regulated and controlled by adjusting the frequency of the high-intensity ultrasonic waves and taking the liquid medium as a coupling medium, and reducing and homogenizing residual stress in the part to be regulated and controlled.
5. The method of claim 1, wherein the ultrasonic transduction device comprises any one of:
the piezoelectric material device is used for exciting elastic waves, the electroacoustic transducer connected with the piezoelectric material device, the magnetoelastic wave device connected with the magnetoelastic wave device, the photoelastic wave device and the photoacoustic transducer connected with the photoelastic wave device.
6. The method of claim 1, wherein the liquid medium comprises any one of:
water, oil, water-oil mixtures containing additives, semi-solid flow media, and colloidal flow media.
7. The method of claim 1, wherein the set distance is in a range of 0.5mm to 1 mm.
8. The method of claim 1, wherein the horn is concave spherical or cylindrical at its forward end for focusing the high intensity ultrasound.
9. The method of claim 1, wherein the connection of the ultrasonic transducer means to the side wall of the container is provided with a sealing medium.
10. The method according to claim 1, characterized in that the temperature of the liquid medium is kept at 25 degrees.
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| CN116103486A (en) * | 2023-02-20 | 2023-05-12 | 北京理工大学 | Complex disc member residual stress water film coupling high-energy sound beam regulating and controlling device |
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