CN117568588A - Metal hemispherical shell multichannel residual stress regulating and controlling device and method - Google Patents
Metal hemispherical shell multichannel residual stress regulating and controlling device and method Download PDFInfo
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- CN117568588A CN117568588A CN202311465166.6A CN202311465166A CN117568588A CN 117568588 A CN117568588 A CN 117568588A CN 202311465166 A CN202311465166 A CN 202311465166A CN 117568588 A CN117568588 A CN 117568588A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 71
- 239000002184 metal Substances 0.000 title claims abstract description 71
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001276 controlling effect Effects 0.000 title claims abstract description 18
- 230000033228 biological regulation Effects 0.000 claims description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000000265 homogenisation Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 75
- 238000009826 distribution Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000005242 forging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a device and a method for regulating and controlling the multi-channel residual stress of a metal hemispherical shell, which can realize the nondestructive reduction of a three-dimensional residual stress field in a metal hemispherical shell structure through a multi-channel coupling mode, have no damage to the surface and the inside of a component, and are particularly suitable for regulating and reducing the local residual stress of the component on site in an on-line and in-situ manner, so that the damage resistance of the component is improved, the deformation of the component is prevented, the service life is prolonged, and the safety and the reliability of equipment service are improved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a device and a method for regulating and controlling multi-channel residual stress of a metal hemispherical shell.
Background
The metal hemispherical shell is formed by forging a blank and the residual stress is necessarily generated in the cutting process, and due to the existence of the residual stress, the manufacturing precision (such as the dimensional precision, the shape and position precision and the like) of the metal hemispherical shell is influenced, and the service performance of the metal hemispherical shell such as the dimensional stability and the like in the subsequent service process is influenced. Therefore, the control of the residual stress of the metal hemispherical shell is an important precondition for realizing high precision and high service performance of the metal hemispherical shell.
The manufacturing process of the component mainly comprises the working procedures of forging, rough/finish turning, heat treatment, surface treatment and the like, and the main causes of deformation are deformation caused by the release of uneven residual stress distribution in the material after the component is subjected to material removal processing. The methods such as cyclic heat treatment or improving the structure of the forging cannot control the distribution of residual stress of the component blank and the subsequent processing process effectively and thoroughly, so that great challenges are brought to the high processing precision and the shape retention capability of the component. Meanwhile, aiming at the large-size spherical shell components, how to regulate and control the internal residual stress of the components is also a difficult problem in the current precision/ultra-precision machining of the components. When the residual stress is concentrated or is larger than the deformation safety limit, the residual stress is released due to the balance effect of the residual stress distribution, and the deformation of the component part is caused.
For a member with weak rigidity, it is generally shown that the local strength is lowered after processing, and serious warpage or bending deformation occurs due to the residual stress in an unbalanced distribution state. The larger the wall thickness difference, the larger the deformation and the greater the possibility of cracking, which is why the member of weak rigidity is easily deformed and cracked. An effective way for solving the processing deformation and cracking of the weak-rigidity component is to synchronously reduce and homogenize the residual stress distribution state in the component in the processing, manufacturing and forming process, and continuously rebuild and maintain the residual stress in the mechanical component in a uniformly distributed balance state. The traditional method adopts natural aging, heat treatment, vibration aging and the like to reduce and regulate the residual stress. However, the natural aging period is long, and the method is only suitable for large-scale components, and has large occupied area and low efficiency; the heat treatment method has the advantages of high equipment cost, high energy consumption, environmental pollution, difficult temperature control, and difficult treatment of the components which are easy to damage due to heating. The vibration aging operation is complex, noise pollution is caused, and the high-rigidity and high-natural frequency components are not easy to treat.
Disclosure of Invention
The invention aims to solve the problems and provide a multi-channel residual stress regulating device and method for a metal hemispherical shell.
The invention realizes the above purpose through the following technical scheme:
a multi-channel residual stress regulating and controlling device for a metal hemispherical shell comprises a supporting device and an exciting device;
the supporting device comprises an aluminum alloy tabletop, four aluminum profile brackets are arranged below the aluminum alloy tabletop, casters are arranged at the bottoms of the aluminum profile brackets, an iron sheet door is arranged between adjacent aluminum profile brackets, and a plurality of axial fans are arranged on the iron sheet door;
the middle part of the aluminum alloy tabletop is provided with a through hole, and four lifting lugs are arranged around the through hole;
the excitation device comprises a spherical shell tool, wherein a plurality of exciters are arranged on the outer surface of the spherical shell tool and are connected with the spherical shell tool through flanges; the contact surface of the exciter and the spherical shell tool is provided with sound-transmitting rubber; the bottom of the outer surface of the spherical shell tool is provided with a supporting block;
the spherical shell tool is arranged in the through hole and is fixed on the aluminum alloy tabletop through a screw.
According to the further scheme, the supporting blocks are used for adjusting the positions of the components, so that the exciters can be perpendicular to the sphere center of the components, and the consistency of subsequent tests is ensured.
The further scheme is that a plurality of positioning blocks and cover plate pressing blocks are uniformly distributed around the through hole, and the positioning blocks are used for leveling and limiting; and a screw is arranged on the cover plate pressing block.
The invention also provides a multi-channel residual stress regulation method for the metal hemispherical shell, which comprises the following steps:
step 1, detecting and recording a stress value of a part to be regulated of a metal hemispherical shell;
step 2, placing the metal hemispherical shell into a spherical shell tool, and leveling and limiting by tightening a screw on a positioning block, so that the metal hemispherical shell can be leveled and has uniform height when placed each time; the nut on the cover plate pressing block is screwed to give a certain pressure to the metal hemispherical shell, so that looseness is avoided in the regulation and control process; attaching sound-transmitting rubber to the front end of the amplitude transformer to tightly handle the working surface of the amplitude transformer and the surface of the regulated metal spherical shell; the spring is arranged on the plug screw, and the distance between the exciter and the installation spherical shell surface of the exciter is adjusted to enable the exciter to be in close contact with the component, so that the loss of ultrasonic energy is reduced, and high-energy sound beams are better input into the metal hemispherical shell;
step 3, starting the high-energy sound beam transducer to emit high-energy sound beams into the metal hemispherical shell, controlling the working frequency to be in a range of 10-20kHz, simultaneously starting the axial flow fan to radiate heat for the exciter, setting the regulation time and amplitude of the high-energy sound beam transducer of different channels according to the stress value of the part to be regulated, enabling the voltage and the output current to be consistent in phase, and controlling the high-energy sound beams to focus sound wave energy on the surface or inside of the material;
step 4, when the expected regulation time is reached, the corresponding high-energy sound beam transducer is closed, and after all the channel high-energy sound beam transducers are closed, the metal hemispherical shell is taken off from the spherical shell tool;
and step 5, detecting and recording the stress value of the part to be regulated of the metal hemispherical shell, comparing the stress value with the initial stress value, comparing the stress value with the stress value detected last time, returning to the step 2 again if the stress value is reduced, and calculating the average residual stress relief rate and the residual stress homogenization rate if the stress value is not changed.
The invention has the beneficial effects that:
according to the multi-channel residual stress regulating device and method for the metal hemispherical shell, disclosed by the invention, the nondestructive reduction of the three-dimensional residual stress field in the metal hemispherical shell structure can be realized through a multi-channel coupling mode, the surface and the inside of a component are not damaged, the device and the method are particularly suitable for regulating and reducing the local residual stress of the component on site in an on-line and in-situ manner, the damage resistance of the component is improved, the deformation of the component is prevented, the service life is prolonged, and the safety and reliability of equipment service are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the practical drawings required in the embodiments or the prior art description, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a structural view of the supporting device of the present invention.
FIG. 3 is a diagram of the structure of an aluminum alloy tabletop of the supporting device of this invention.
FIG. 4 is a block diagram of an actuator device according to the present invention.
FIG. 5 is a graph showing the residual stress distribution of the metal hemispherical shell before and after the adjustment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In any embodiment, as shown in fig. 2-4, the multi-channel residual stress control device for the metal hemispherical shell comprises a supporting device and an excitation device;
the supporting device comprises an aluminum alloy table top 1, four aluminum section brackets 2 are arranged below the aluminum alloy table top 1, casters 3 are arranged at the bottoms of the aluminum section brackets 2, an iron sheet door 4 is arranged between adjacent aluminum section brackets 2, and a plurality of axial flow fans 5 are arranged on the iron sheet door 4;
the middle part of the aluminum alloy tabletop 1 is provided with a through hole, and four lifting lugs 6 are arranged around the through hole; the aluminum profile bracket 2 is attractive in appearance and light in weight under the requirement of ensuring the bearing strength, and is convenient to install and transport; the aluminum alloy desktop 1 is mainly a fixed spherical shell tool; the weight of the device is about 280Kg, and four casters 3 are arranged to facilitate the movement of the device; because the device can generate more heat when in work, two axial fans 5 are respectively arranged on four sides to dissipate heat; the four lifting lugs 6 on the tabletop are mainly used for lifting during installation and quick operation.
The excitation device comprises a spherical shell tool 12, wherein a plurality of exciters 13 are arranged on the outer surface of the spherical shell tool 12, and the exciters 13 are connected with the spherical shell tool 12 through flanges 15; the contact surface of the exciter 13 and the spherical shell tool 12 is provided with sound-transmitting rubber 16; the bottom of the outer surface of the spherical shell tool 12 is provided with the supporting block 14, and the supporting block 14 mainly has the function of enabling the exciter to be perpendicular to the spherical center of the component through rotating the screw rod to adjust the position of the component, so that the consistency of subsequent tests is ensured. Attaching sound-transmitting rubber 16 to the front end of the exciter 13 to tightly handle the working surface of the exciter 13 with the surface of the regulated metal spherical shell; the flange 15 is provided with a spring for installing a plug screw, and the distance between the exciter and the installation spherical shell surface of the exciter is adjusted to enable the exciter to be in close contact with the component, so that the loss of ultrasonic energy is reduced, and high-energy sound beams are better input into the metal hemispherical shell.
The spherical shell tooling 12 is arranged in the through hole and is fixed on the aluminum alloy tabletop 1 through the screw 10, and is used for placing and supporting the metal hemispherical shell 11.
Four positioning blocks 7 and eight cover plate pressing blocks 8 are arranged on the aluminum alloy tabletop, and leveling and limiting are performed by screwing screws on the positioning blocks 7, so that the metal hemispherical shell 11 to be tested can be leveled and has consistent height when placed each time; the screw 9 on the cover plate pressing block 8 is screwed to give a certain pressure to the ball shell tool 12 to be tested, so that looseness is avoided in the process of regulating and controlling the metal hemispherical shell 11 to be tested.
In any embodiment, as shown in fig. 1, the method for regulating and controlling the residual stress of the metal hemispherical shell in a multi-channel manner comprises the following steps:
in order to well express the regulation and control effect of the high-energy sound beam on the residual stress, a concept of average residual stress relief rate and residual stress homogenization rate is provided, and the residual stress relief rate of each detection point is defined as: unregulated stress value A i And finally regulated stress value B i Difference |A i -B i I, with unregulated stress A i Ratio of (2), i.eAnd the average residual stress relief rate of the spherical shell part as a whole is defined as +.>Residual stress reduction homogenization is defined as: unregulated stress standard deviation S A Standard deviation S of stress after regulation and control B Difference |S A -S B I, and standard deviation S of unregulated stress A Ratio of (2), i.e.)> Finally, the hemispherical profile deviation of the regulated spherical shell and the spherical shell which is not regulated after final finish machining can be compared, the material performance and the change of the texture of the components before and after regulation are observed, and the residual stress elimination in practical application is judgedEffects.
Step 1, detecting and recording a stress value of a part to be regulated of a metal hemispherical shell;
step 2, placing the metal hemispherical shell into a spherical shell tool, and leveling and limiting by tightening a screw on a positioning block, so that the metal hemispherical shell can be leveled and has uniform height when placed each time; the nut on the cover plate pressing block is screwed to give a certain pressure to the metal hemispherical shell, so that looseness is avoided in the regulation and control process; attaching sound-transmitting rubber to the front end of the amplitude transformer to tightly handle the working surface of the amplitude transformer and the surface of the regulated metal spherical shell; the spring is arranged on the plug screw, and the distance between the exciter and the installation spherical shell surface of the exciter is adjusted to enable the exciter to be in close contact with the component, so that the loss of ultrasonic energy is reduced, and high-energy sound beams are better input into the metal hemispherical shell;
step 3, starting the high-energy sound beam transducer to emit high-energy sound beams into the metal hemispherical shell, controlling the working frequency to be in a range of 10-20kHz, simultaneously starting the axial flow fan to radiate heat for the exciter, setting the regulating time, the working frequency and the amplitude of the high-energy sound beam transducer of different channels according to the stress value of the part to be regulated, enabling the voltage and the phase of the output current to be consistent, and controlling the high-energy sound beams to focus the sound wave energy on the surface or inside of the material;
step 4, when the expected regulation time is reached, the corresponding high-energy sound beam transducer is closed, and after all the channel high-energy sound beam transducers are closed, the metal hemispherical shell is taken off from the spherical shell tool;
and step 5, detecting and recording the stress value of the part to be regulated of the metal hemispherical shell, comparing the stress value with the initial stress value, comparing the stress value with the stress value detected last time, returning to the step 2 again if the stress value is reduced, and calculating the average residual stress relief rate and the residual stress homogenization rate if the stress value is not changed.
By adopting the method, the part to be regulated and controlled of the metal hemispherical shell can be completely coupled with the high-energy acoustic beam transducer, the high-energy acoustic beam transducer is started, high-energy ultrasonic waves are driven into the metal hemispherical shell, and under the condition that the working frequency of the ultrasonic waves is ensured to be within the range of 10-20kHz, the mass points in the metal hemispherical shell are driven to vibrate along the acoustic beam direction, so that the residual stress in the material is regulated and controlled, the residual stress in the metal hemispherical shell is removed through the high-energy acoustic beam, the subsequent processing precision of the metal hemispherical shell is ensured, and the processing deformation of the metal hemispherical shell is reduced. The directionality of the sound beam can enable sound wave energy to be focused on any part on the surface and in the material, and the local focusing and directional reduction and homogenization of residual stress in the material can be realized by changing the set position of the high-energy sound beam channel and the regulation time, the working frequency and the amplitude of the transducer.
By adopting the method, whether the residual stress in the metal hemispherical shell is regulated and controlled is determined by regulating and controlling the residual stress comparison before and after the regulation and control, so that the machining precision of the metal hemispherical shell is ensured, and the machining deformation of the metal hemispherical shell is reduced. And adjusting the working frequency and voltage of the high-energy sound beam according to the frequency of the high-energy sound beam transducer so as to ensure that the output voltage and the output current are consistent in phase. Therefore, a better debugging effect can be achieved, and the debugging effect of the high-energy sound beam on the residual stress of the metal hemispherical shell is better. The traditional ultrasonic couplant is replaced by the sound-transmitting rubber, so that the energy loss of high-energy sound beams can be reduced, the amplitude rod is prevented from being in direct contact with a component, and the effects of reducing and homogenizing residual stress are improved.
FIG. 5 shows the residual stress distribution values of the metal hemispherical shells before and after the regulation of the method. The sample regulating and controlling process comprises the following steps: 1. taking an unregulated metal spherical shell for ultrasonic stress measurement and recording; 2. regulating and controlling the metal hemispherical shell for 4 times, wherein the total regulating and controlling time is 2 hours each time for 0.5 hour; 3. ultrasonic stress measurement and recording of the regulated spherical shell stress; as shown in fig. 5, the square line type represents the residual stress distribution value of the metal hemispherical shell after being processed, and the round line type represents the residual stress distribution value of the metal hemispherical shell after being regulated by the multi-channel stress regulation method for the metal hemispherical shell provided by the application. By comparing the residual stress before and after the regulation, the residual stress of each detection point position of the metal hemispherical shell after the regulation is obviously reduced compared with that before the regulation.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (4)
1. The multi-channel residual stress regulating and controlling device for the metal hemispherical shell is characterized by comprising a supporting device and an exciting device;
the supporting device comprises an aluminum alloy tabletop, four aluminum profile brackets are arranged below the aluminum alloy tabletop, casters are arranged at the bottoms of the aluminum profile brackets, an iron sheet door is arranged between adjacent aluminum profile brackets, and a plurality of axial fans are arranged on the iron sheet door;
the middle part of the aluminum alloy tabletop is provided with a through hole, and four lifting lugs are arranged around the through hole;
the excitation device comprises a spherical shell tool, wherein a plurality of exciters are arranged on the outer surface of the spherical shell tool and are connected with the spherical shell tool through flanges; the contact surface of the exciter and the spherical shell tool is provided with sound-transmitting rubber; the bottom of the outer surface of the spherical shell tool is provided with a supporting block;
the spherical shell tool is arranged in the through hole and is fixed on the aluminum alloy tabletop through a screw.
2. The multi-channel residual stress control device for a metal hemispherical shell according to claim 1, wherein the supporting blocks are used for adjusting the positions of the components, so that the exciters can be perpendicular to the sphere center of the components, and the consistency of subsequent tests is ensured.
3. The multi-channel residual stress control device for the metal hemispherical shell according to claim 1, wherein a plurality of positioning blocks and cover plate pressing blocks are uniformly distributed around the through hole, and the positioning blocks are used for leveling and limiting; and a screw is arranged on the cover plate pressing block.
4. The multi-channel residual stress regulation and control method for the metal hemispherical shell is characterized by comprising the following steps of:
step 1, detecting and recording a stress value of a part to be regulated of a metal hemispherical shell;
step 2, placing the metal hemispherical shell into a spherical shell tool, and leveling and limiting by tightening a screw on a positioning block, so that the metal hemispherical shell can be leveled and has uniform height when placed each time; the nut on the cover plate pressing block is screwed to give a certain pressure to the metal hemispherical shell, so that looseness is avoided in the regulation and control process; attaching sound-transmitting rubber to the front end of the amplitude transformer to tightly handle the working surface of the amplitude transformer and the surface of the regulated metal spherical shell; the spring is arranged on the plug screw, and the distance between the exciter and the installation spherical shell surface of the exciter is adjusted to enable the exciter to be in close contact with the component, so that the loss of ultrasonic energy is reduced, and high-energy sound beams are better input into the metal hemispherical shell;
step 3, starting the high-energy sound beam transducer to emit high-energy sound beams into the metal hemispherical shell, controlling the working frequency to be in a range of 10-20kHz, simultaneously starting the axial flow fan to radiate heat for the exciter, setting the regulation time and amplitude of the high-energy sound beam transducer of different channels according to the stress value of the part to be regulated, enabling the voltage and the output current to be consistent in phase, and controlling the high-energy sound beams to focus sound wave energy on the surface or inside of the material;
step 4, when the expected regulation time is reached, the corresponding high-energy sound beam transducer is closed, and after all the channel high-energy sound beam transducers are closed, the metal hemispherical shell is taken off from the spherical shell tool;
and step 5, detecting and recording the stress value of the part to be regulated of the metal hemispherical shell, comparing the stress value with the initial stress value, comparing the stress value with the stress value detected last time, returning to the step 2 again if the stress value is reduced, and calculating the average residual stress relief rate and the residual stress homogenization rate if the stress value is not changed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311465166.6A CN117568588A (en) | 2023-11-03 | 2023-11-03 | Metal hemispherical shell multichannel residual stress regulating and controlling device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311465166.6A CN117568588A (en) | 2023-11-03 | 2023-11-03 | Metal hemispherical shell multichannel residual stress regulating and controlling device and method |
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| CN202311465166.6A Pending CN117568588A (en) | 2023-11-03 | 2023-11-03 | Metal hemispherical shell multichannel residual stress regulating and controlling device and method |
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| CN (1) | CN117568588A (en) |
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