CN114670127A - Ultrasonic shot blasting shape correction method and device and ultrasonic shot blasting device - Google Patents

Abstract

The invention discloses an ultrasonic shot peening shape correction method, a device and an ultrasonic shot peening device. The ultrasonic shot peening shape correction method comprises the steps of: A. Obtaining the deformation amount requirement of the surface of a metal part; B. Simulating and calculating the deformation amount according to the deformation amount requirement The required residual stress field distribution; C. Compare the calculated residual stress field distribution with the residual stress field distribution stored in the database, and determine whether there is a residual stress field distribution in the database that meets the preset requirements, and if so, enter the step D; D. According to the residual stress field distribution satisfying the preset requirements obtained in step C, find out the corresponding shot peening intensity and shot peening time from the database. The ultrasonic shot peening shape correction method and device can effectively solve the problems of too many ultrasonic shot peening parameters, difficulty in efficient selection, and difficulty in accurately controlling shot peening time.

Description

Ultrasonic shot peening shape correction method, device and ultrasonic shot peening device

technical field

The invention relates to the technical field of surface treatment, and more particularly, to an ultrasonic shot peening shape correction method, device and ultrasonic shot peening device.

Background technique

Ultrasonic shot peening shape correction technology is a new type of surface shot peening shape correction technology, which is widely used in engineering. So far, due to the advantages of simple ultrasonic shot peening process equipment and process control, environmental protection process, and low process cost, it has been widely used in aerospace manufacturing and automobile manufacturing, such as aircraft wing skins, aluminum alloy wheels, automobile coverings, etc. parts, fuel tanks, rocket shape panels, etc. Although a good shot peening effect was obtained, due to too many ultrasonic shot peening parameters, it is difficult to select efficiently, and it is difficult to accurately control the shot peening time, which limits the engineering application of ultrasonic shot peening. At the same time, in practical engineering applications, there has been a lack of reasonable technical means and methods for the shot peening of metal parts with complex shapes and asymmetric structures.

SUMMARY OF THE INVENTION

In view of this, the first object of the present invention is to provide an ultrasonic shot peening shape correction method and device, which can effectively solve the problem that the ultrasonic shot peening parameters are too many, and it is difficult to select efficiently, and It is difficult to accurately control the shot peening time. The second object of the present invention is to provide an ultrasonic shot peening device applying the above-mentioned ultrasonic shot peening shape correction method.

In order to achieve the above-mentioned first purpose, the present invention provides the following technical solutions:

An ultrasonic shot peening shape correction method, comprising the steps of:

A. Obtain the deformation requirements of the surface of metal parts;

B. Simulate and calculate the required residual stress field distribution according to the deformation requirements;

C. Compare the calculated residual stress field distribution with the residual stress field distribution stored in the database, and determine whether there is a residual stress field distribution that meets the preset requirements in the database, and if so, go to step D, where the database stores There is a corresponding relationship between residual stress field distribution, shot peening intensity, shot peening time and deformation of the test piece, and the material of the test piece is the same as that of the above-mentioned metal parts;

D. According to the residual stress field distribution satisfying the preset requirements obtained in step C, find out the corresponding shot peening intensity and shot peening time from the database.

Preferably, step C1 is also included after the step C:

If there are residual stress field distributions that meet the preset requirements in the database, determine whether the number of residual stress field distributions that meet the preset requirements in the database is greater than 1, and if so, select from multiple residual stress field distributions that meet the preset requirements. A residual stress field distribution that meets the set requirements, go to step D;

Otherwise, go to step D directly.

Preferably, the method for establishing the database comprises the steps of:

a. Determine the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities;

b. Simulate the actual working conditions to obtain the residual stress field distribution under different shot peening intensity and shot peening time;

c. Store the correspondence between residual stress field, shot peening intensity, shot peening time and specimen deformation.

Preferably, in the step a, specifically:

The relationship between the deformation of the specimen and the shot peening time under different shot peening intensities was measured by the Almen measuring instrument;

Taking the variable vector of the specimen as the vertical axis and the shot peening time as the horizontal axis, draw the saturation curve under different shot peening intensities;

The step c is specifically: storing the residual stress field, the shot peening intensity, the corresponding relationship between the shot peening time and the deformation amount of the specimen, and the saturation curve under different shot peening intensities.

Preferably, in the step B, specifically:

According to the deformation requirements, the required residual stress field distribution is calculated by finite element software simulation.

Preferably, the database also stores a plurality of correspondences between shot peening parameter combinations and shot peening intensity, and the shot peening parameter combinations include at least one of amplitude, firing pin material, firing pin diameter, distance between the firing pin and the surface of the metal part, and air pressure. two;

After the step D, step E is further included: determining the shot peening parameter combination according to the shot peening intensity corresponding to the residual stress field distribution satisfying the preset requirement found from the database.

An ultrasonic shot peening shape correction device, comprising:

The acquisition module is used to obtain the deformation requirements of the surface of metal parts;

The simulation module is used to simulate and calculate the required residual stress field distribution according to the deformation requirements of the surface of the metal part obtained by the acquisition module;

The first comparison module is used to compare the calculated residual stress field distribution with the residual stress field distribution stored in the database, and screen out the residual stress field distribution that meets the preset requirements from the database, where the residual stress field distribution is stored in the database Corresponding relationship between stress field distribution, shot peening intensity, shot peening time and deformation of the test piece, the material of the test piece is the same as the material of the above-mentioned metal parts;

a first judging module for receiving the structure of the first comparison module and judging whether there is a residual stress field distribution that meets preset requirements in the database;

The first search module is configured to receive the judgment result of the judgment module, and if it is judged that there is a residual stress field distribution that meets the preset requirements in the database, according to the residual stress field distribution that meets the preset requirements, find out the corresponding spray from the database. Shot strength and shot peening time.

Preferably, it also includes a second judgment module and a selection module;

The second judging module is used for judging the number of residual stress field distributions that meet the preset requirements selected from the database;

The selection module is used for selecting a residual stress field distribution that meets the preset requirement from a plurality of residual stress field distributions that meet the preset requirement.

Preferably, a second search module is also included, which is configured to search the shot peening parameter combination from the database according to the shot peening intensity searched by the first module.

An ultrasonic shot peening device applying the ultrasonic shot peening shape correction method as described in any one of the above, comprising:

Ultrasonic generators and ultrasonic transducers;

A vibrating body and at least one striker, the vibrating body is connected with the ultrasonic transducer, and the rapping body is used to strike the striker to eject the striker.

When applying the ultrasonic shot peening shape correction method and device provided by the invention, the shot peening intensity and shot peening can be efficiently determined by using the database storing the correspondence relationship between residual stress field distribution, shot peening intensity, shot peening time and specimen deformation amount. Time, and then select shot peening parameters efficiently according to shot peening intensity, accurately control shot peening time, one shot peening calibration has high forming accuracy; it is suitable for metal parts of any size, shape and structure.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the flow chart of the ultrasonic shot peening shape correction method provided by an embodiment of the present invention;

2 is a flowchart of an ultrasonic shot peening method for shape correction provided by another embodiment of the present invention;

3 is a flow chart of an ultrasonic shot peening shape correction method provided by another embodiment of the present invention;

4 is a flowchart of an ultrasonic shot peening shape correction method provided by another embodiment of the present invention;

5 is a flowchart of a database establishment method provided by an embodiment of the present invention;

6 is a flowchart of a database establishment method provided by another embodiment of the present invention;

7 is a schematic diagram of a saturation curve provided by an embodiment of the present invention;

8 is a schematic diagram of an ultrasonic shot peening shape correction device provided by an embodiment of the present invention;

9 is a flowchart of an ultrasonic shot peening method for shape correction provided by another embodiment of the present invention;

10 is a flowchart of an ultrasonic shot peening shape correction method provided by another embodiment of the present invention;

11 is a partial cross-sectional view of an ultrasonic shot blasting device provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an ultrasonic shot blasting device provided by an embodiment of the present invention.

In Figure 11-12:

1- Ultrasonic transducer, 2- Vibrating body, 3- Striker.

Detailed ways

The first object of the present invention is to provide an ultrasonic shot peening shape correction method and device, which can effectively solve the problem of too many ultrasonic shot peening parameters, difficult to select efficiently, and difficult to accurately control the peening The second object of the present invention is to provide an ultrasonic shot peening device applying the above-mentioned ultrasonic shot peening shape correction method.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right" are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Example 1:

Please refer to FIG. 1, the ultrasonic shot peening shape correction method provided by this embodiment includes the steps:

S1. Obtain the deformation requirements of the surface of the metal parts;

That is, first obtain the deformation amount requirement of the metal surface. Specifically, the deformation amount requirement of the metal surface can be obtained by means of calculation or detection.

S2. Simulate and calculate the required residual stress field distribution according to the deformation requirements;

The required residual stress field distribution can be calculated and simulated by finite element software according to the deformation requirements. Specifically, input the deformation requirement of the surface of the metal part obtained in step S1 into the finite element software, and then simulate and calculate the required residual stress field distribution.

Of course, the required residual stress field distribution can also be simulated and calculated by other methods, which is not limited here.

S3. Compare the calculated residual stress field distribution with the residual stress field distribution stored in the database.

The residual stress field distribution required by the simulation calculation in step S2 is compared with the residual stress field distribution stored in the database.

It should be noted here that the database stores the corresponding relationship between residual stress field distribution, shot peening intensity, shot peening time and the deformation of the specimen, and the material of the specimen is the same as that of the above-mentioned metal parts. That is, there are multiple sets of corresponding residual stress field distribution, shot peening intensity, shot peening time and specimen deformation in the database. The residual stress field distribution, shot peening intensity, shot peening time and specimen deformation amount corresponding to each group are all specific values.

The database can be continuously updated and supplemented to meet the judgment criteria required by the specific industry.

S4, determine whether there is a residual stress field distribution that meets the preset requirements in the database, and if so, go to step S5;

According to the comparison result in step S3, it is determined whether the residual stress field distribution satisfying the preset requirement is stored in the database. The preset requirements may be set according to actual requirements. For example, the preset requirements may be that the compressive stress is within a first preset range and/or the depth of the compressive stress layer is within a second preset range, which is not limited herein. The residual stress field distribution that meets the preset requirements in this step is the same or similar residual stress field distribution to the required residual stress field distribution that is simulated and calculated in step S2.

S5. According to the obtained residual stress field distribution meeting the preset requirements, find out the corresponding shot peening intensity and shot peening time from the database.

Specifically, in step S4, the residual stress field distribution in the database that meets the preset requirements is obtained as the target residual stress field distribution, and the shot peening intensity and shot peening time corresponding to the target residual stress field distribution are found from the database, and finally can be determined Appropriate peening intensity and peening time.

When applying the ultrasonic shot peening shape correction method provided by the invention, the shot peening intensity and shot peening time can be efficiently determined by using the database storing the correspondence relationship between residual stress field distribution, shot peening intensity, shot peening time and specimen deformation amount. Then, the shot peening parameters are efficiently selected according to the shot peening intensity, and the shot peening time is accurately controlled.

Embodiment 2

As shown in FIG. 2 , the difference between the second embodiment and the first embodiment is that the second embodiment further includes step S40 after step S4: if there is no residual stress field distribution that meets the preset requirements in the database, it is determined that the shape correction cannot be performed. .

Steps S1-S5 of the second embodiment are the same as those of the first embodiment, and are not repeated here.

Embodiment 3

As shown in Figure 3, in this Embodiment 3, on the basis of Embodiment 1 or Embodiment 2, steps S41 and S42 are added after step S4:

S41: determine whether the number of residual stress field distributions that meet the preset requirements in the database is greater than 1, if so, go to step S42, if not, go to step S5;

Specifically, there may be multiple residual stress field distributions in the database that meet the preset requirements, or there may be multiple residual stress field distributions in the database that are the same as or similar to the residual stress field distribution required by the simulation calculation in step S2.

If the number of residual stress field distributions that meet the preset requirements in the database is not greater than 1, the residual stress field distribution in the database that meets the preset requirements is used as the target residual stress field distribution, and the target residual stress field distribution is found from the database. The corresponding shot peening intensity and shot peening time can finally determine the appropriate shot peening intensity and shot peening time.

S42 : select a residual stress field distribution that meets the preset requirements from a plurality of residual stress field distributions that meet the preset requirements, and go to step S5 .

If the number of residual stress field distributions that meet the preset requirements in the database is greater than 1, select one residual stress field distribution that meets the preset requirements from a plurality of residual stress field distributions that meet the preset requirements as the target residual stress field distribution, Find the shot peening intensity and shot peening time corresponding to the target residual stress field distribution from the database.

The above setting requirements can be set by themselves according to the actual situation, for example, the setting requirements can be that the compressive stress is within the third preset range and/or the depth of the compressive stress layer is within the fourth preset range. The third preset range may be located within the first preset range, and the fourth preset range may be located within the second preset range. In other words, from a plurality of residual stress field distributions that meet the preset requirements, select the one that is closest to the required residual stress field distribution simulated in step S2, and compare the selected residual stress field with the required residual stress field calculated in step S2. The residual stress field distribution with the closest distribution is used as the target residual stress field distribution, and the shot peening intensity and shot peening time corresponding to the target residual stress field distribution are found from the database.

S5: According to the obtained residual stress field distribution that meets the preset requirements, find out the corresponding shot peening intensity and shot peening time from the database.

Specifically, if the number of residual stress field distributions that meet the preset requirements in the database is not greater than 1, the residual stress field distributions that meet the preset requirements in the database are used as the target residual stress field distribution, and the residual stress field distribution that meets the preset requirements in the database is used to find the The shot peening intensity and shot peening time corresponding to the stress field distribution can finally determine the appropriate shot peening intensity and shot peening time.

If the number of residual stress field distributions that meet the preset requirements in the database is greater than 1, select one residual stress field distribution that meets the preset requirements from a plurality of residual stress field distributions that meet the preset requirements as the target residual stress field distribution, Find the shot peening intensity and shot peening time corresponding to the target residual stress field distribution from the database.

Embodiment 4

Optionally, the database also stores a plurality of correspondences between shot peening parameter combinations and shot peening intensity, where the shot peening parameter combinations include at least two of amplitude, striker material, striker diameter, distance between striker and the surface of the metal part, and air pressure. Each shot peening parameter combination includes specific values for at least two of amplitude, striker material, striker diameter, striker-to-metal part surface distance, and air pressure. When the shot peening intensity corresponding to the target residual stress field distribution is found from the database, the appropriate shot peening parameter combination can be selected according to the found shot peening intensity.

As shown in Figure 4, in this embodiment four, on the basis of embodiment one, embodiment two or embodiment three, add step S6 after step S5:

The shot peening parameter combination is determined according to the shot peening intensity corresponding to the residual stress field distribution that meets the preset requirements found from the database.

That is, when the shot peening intensity corresponding to the target residual stress field distribution is found from the database, the appropriate shot peening parameter combination can be selected according to the found shot peening intensity, so that the shot peening parameter combination can be determined more efficiently.

As shown in Figure 5, the present embodiment provides a method for establishing a database, including the steps:

Sa. Determine the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities;

Preferably, an Almen measuring instrument can be used to measure the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities.

Specifically, the Almen measuring instrument can be used to measure the deformation of the specimen with different shot peening times under the preset shot peening intensity, so as to obtain the relationship between the deformation amount of the specimen and the shot peening time under the preset shot peening intensity. By changing the value of the preset shot peening intensity, the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities was obtained. Finally, the corresponding relationship between the shot peening strength, the deformation of the specimen and the shot peening time is obtained.

Here, the test piece can be an Almen test piece, and the material of the test piece and the metal parts shall be the same.

Of course, other methods can also be used to measure the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities, which are not limited here.

b. Simulate the actual working conditions to obtain the residual stress field distribution under different shot peening intensity and shot peening time;

The finite element software was used to simulate the actual working conditions, and the residual stress field distribution of the specimen under different shot peening intensities and shot peening times was obtained. Finally, the corresponding relationship between shot peening intensity, shot peening time and residual stress field distribution of the specimen is obtained.

c. Store the correspondence between residual stress field, shot peening intensity, shot peening time and specimen deformation.

That is, the corresponding relationship between the residual stress field, shot peening intensity, shot peening time and the deformation of the specimen is stored.

As shown in Figure 6, in a specific embodiment,

Sa: Use the Almen measuring instrument to measure the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities;

Sa1: Take the variable vector of the specimen as the vertical axis and the shot peening time as the horizontal axis, draw the saturation curve under different shot peening intensities;

Sc: Stores the correspondence between residual stress field, shot peening intensity, shot peening time and specimen deformation, and the saturation curve under different shot peening intensities.

In Sa, the Almen measuring instrument can be used to measure the deformation of the specimen with different shot peening time under the preset shot peening intensity, so as to obtain the relationship between the deformation amount of the specimen and the shot peening time under the preset shot peening intensity . By changing the value of the preset shot peening intensity, the relationship between the deformation of the specimen and the shot peening time under different shot peening intensities was obtained. Finally, the corresponding relationship between the shot peening strength, the deformation of the specimen and the shot peening time is obtained.

As shown in Figure 7, in Sa1, by changing the value of the shot peening intensity, multiple saturation curves can be obtained. Under different shot peening intensities, the obtained saturation curves are different.

Specifically in Sc, the stored residual stress field, shot peening intensity, shot peening time and the corresponding relationship of the specimen deformation amount of the stored specimen, and the saturation curve under different shot peening intensities. In other words, the distribution of residual stress field and deformation amount stored in the database is the stored residual stress field and deformation amount of the specimen, but the material of the specimen is the same as that of the metal part to be shot peened.

When the above database also stores the correspondence between multiple shot peening parameter combinations and shot peening intensity, the method of the database also includes:

Sa0: measure the shot peening intensity corresponding to multiple sets of shot peening parameter combinations;

The shot peening intensity corresponding to multiple sets of shot peening parameter combinations of the ultrasonic shot peening device can be measured by an Almen measuring instrument.

Sa1: Store multiple sets of shot peening parameter combinations and the shot peening intensity corresponding to each set of shot peening parameter combinations.

It can be seen from the above that in the above ultrasonic shot peening shape calibration method, each shot peening parameter of the experimental device is concentrated on the shot peening intensity parameter; by drawing the saturation curve, the shot peening time and deformation amount are determined under any shot peening intensity. By simulating actual working conditions with finite element software, a database of the correspondence between residual stress field distribution and shot peening intensity, shot peening time, and deformation amount can be established; in order to meet the requirements of workpiece shape correction, use The finite element software simulates and calculates the residual stress field distribution corresponding to the required shape correction amount, and compares and selects in the database to determine the shot peening parameters and the corresponding shot peening time. The method not only improves the efficiency of selecting shot peening parameters, but also realizes the accurate control of shot peening time; at the same time, the invention can select the optimal machining parameters according to the precision requirements of the workpiece; and the residual stress field is simulated and calculated by finite element software. The method of inversely selecting shot peening parameters in the distribution situation provides a practical technical method for shape correction of metal parts with asymmetric structure and complex shape, which can realize the high precision, high efficiency and high adaptability of ultrasonic shot peening shape correction technology, and obtain The shot peening surface with excellent surface quality can be widely used in the field of metal shape correction.

Embodiment 5

As shown in FIG. 8 , the fifth embodiment discloses an ultrasonic shot peening shape correction device. The ultrasonic shot peening shape correction device includes a receiving module, a simulation module, a first comparison module, a first judgment module and a first search module.

Among them, the acquisition module is used to acquire the deformation requirement of the surface of the metal part. The simulation module is used to simulate and calculate the required residual stress field distribution according to the deformation requirements of the surface of the metal part obtained by the acquisition module. The simulation module may be finite element software. Specifically, the deformation requirement of the metal part surface obtained in step S1 is input into the finite element software, and then the deformation requirement of the metal part surface is simulated to calculate the deformation requirement of the metal part surface. The simulation module can also be other software, which is not limited here.

The first comparison module is used to compare the calculated residual stress field distribution with the residual stress field distribution stored in the database, and select the residual stress field distribution that meets the preset requirements from the database. The database stores the corresponding relationship between residual stress field distribution, shot peening intensity, shot peening time and deformation amount of the test piece, and the material of the test piece is the same as that of the above-mentioned metal parts. That is, there are multiple sets of corresponding residual stress field distribution, shot peening intensity, shot peening time and specimen deformation in the database. The residual stress field distribution, shot peening intensity, shot peening time and specimen deformation amount corresponding to each group are all specific values.

The first judging module is used for receiving the structure of the first comparing module and judging whether there is a residual stress field distribution that meets the preset requirements in the database. The preset requirements may be set according to actual requirements. For example, the preset requirements may be that the compressive stress is within a first preset range and/or the depth of the compressive stress layer is within a second preset range, which is not limited herein. The residual stress field distribution satisfying the preset requirement in this step is the residual stress field distribution that is the same as or similar to the residual stress field distribution required for the simulation calculation by the simulation module.

The first search module is used to receive the judgment result of the judgment module. If it is judged that there is a residual stress field distribution that meets the preset requirements in the database, according to the residual stress field distribution that meets the preset requirements, the corresponding shot peening intensity is searched from the database. and shot peening time. Specifically, the residual stress field distribution in the database that meets the preset requirements is used as the target residual stress field distribution, and the shot peening intensity and shot peening time corresponding to the target residual stress field distribution are found from the database, and finally the appropriate shot peening intensity can be determined. and shot peening time.

When applying the ultrasonic shot peening shape correcting device provided by the invention, the shot peening intensity and shot peening time can be efficiently determined by using the database storing the corresponding relationship between residual stress field distribution, shot peening intensity, shot peening time and specimen deformation amount. Then, the shot peening parameters are efficiently selected according to the shot peening intensity, and the shot peening time is accurately controlled.

Embodiment 6

As shown in FIG. 9 , the sixth embodiment is different from the fifth embodiment in that it further includes a second judgment module and a selection module. The second judging module is used for judging the number of residual stress field distributions that meet the preset requirements selected from the database. The selection module is used to select a residual stress field distribution that meets the preset requirements from a plurality of residual stress field distributions that meet the preset requirements.

Specifically, there may be multiple residual stress field distributions that meet the preset requirements in the database, or there may be multiple residual stress field distributions in the database that are the same as or similar to the residual stress field distributions required by the simulation calculation by the simulation module.

If the number of residual stress field distributions that meet the preset requirements in the database is not greater than 1, the residual stress field distribution in the database that meets the preset requirements is used as the target residual stress field distribution, and the target residual stress field distribution is found from the database. The corresponding shot peening intensity and shot peening time can finally determine the appropriate shot peening intensity and shot peening time. If the number of residual stress field distributions that meet the preset requirements in the database is greater than 1, the selection module selects one residual stress field distribution that meets the preset requirements from a plurality of residual stress field distributions that meet the preset requirements as the target residual stress field distribution, and find out the shot peening intensity and shot peening time corresponding to the target residual stress field distribution from the database.

Embodiment 7

As shown in FIG. 10 , the seventh embodiment adds a second search module on the basis of the fifth or sixth embodiment, that is, the ultrasonic shot peening shape correction device further includes a second search module, which is used for searching according to the first module The shot peening intensity looks up the shot peening parameter combination from the database.

When the first search module finds out the shot peening intensity corresponding to the target residual stress field distribution from the database, the second search module can select an appropriate combination of shot peening parameters according to the found shot peening intensity, so that the shot peening intensity can be determined more efficiently. Pill parameter combination.

As shown in Figures 11-12, the present invention also provides an ultrasonic shot peening device applying the ultrasonic shot peening shape correction method according to any of the above embodiments, which comprises: an ultrasonic generator, an ultrasonic transducer 1, a vibration body 2 and at least one striker 3. Wherein, the vibrating body 2 is connected with the ultrasonic transducer 1, and the rapping body is used to strike the striker 3 to eject it.

Specifically, the ultrasonic generator, the ultrasonic transducer 1, the vibrating body 2 and the striker 3 are connected in sequence. The ultrasonic generator is used to input high-frequency current into the ultrasonic transducer, and the ultrasonic transducer is used to convert the electrical power input by the ultrasonic power source into mechanical power of longitudinal wave vibration, and transmit the longitudinal wave vibration to the vibrating body 2 . The vibrating body 2 is used to strike the striker 3 so that the striker 3 is ejected. The striker 3 has a strong impact on the surface of the metal part, produces microscopic plastic deformation on the surface of the metal part, implants favorable residual compressive stress, and eliminates harmful residual tensile stress.

A horn may be arranged between the ultrasonic transducer 1 and the vibrating body 2, which is not limited here.

The number of ultrasonic generators, ultrasonic transducers 1 and vibrating bodies 2 may be multiple and in one-to-one correspondence, and each vibrating body 2 may be provided with a plurality of strikers 3 correspondingly. This setting greatly improves the shot peening efficiency.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An ultrasonic shot peening shape correction method is characterized by comprising the following steps:

A. acquiring the deformation requirement of the surface of the metal part;

B. simulating and calculating the required residual stress field distribution according to the deformation requirement;

C. comparing the calculated residual stress field distribution with residual stress field distributions stored in a database, judging whether residual stress field distributions meeting preset requirements exist in the database, if so, entering a step D, wherein the database stores the corresponding relation among the residual stress field distributions, shot blasting strength, shot blasting time and deformation of a test piece, and the material of the test piece is the same as that of the metal part;

D. and C, searching the corresponding shot blasting intensity and shot blasting time from the database according to the residual stress field distribution meeting the preset requirement obtained in the step C.

2. The ultrasonic shot peening method of claim 1, further comprising a step C1 after said step C:

if the residual stress field distribution meeting the preset requirement exists in the database, judging whether the number of the residual stress field distributions meeting the preset requirement in the database is greater than 1, if so, selecting one residual stress field distribution meeting the set requirement from the residual stress field distributions meeting the preset requirement, and entering the step D;

if not, directly entering the step D.

3. An ultrasonic peen profiling method according to claim 1, wherein the database creating method comprises the steps of:

a. determining the relation between the deformation of the test piece and the shot blasting time under different shot blasting strengths;

b. simulating the actual working condition to obtain the residual stress field distribution under different shot blasting intensities and shot blasting times;

c. and storing the corresponding relation among the residual stress field, the shot blasting intensity, the shot blasting time and the deformation of the test piece.

4. An ultrasonic shot peening method according to claim 3, wherein the step a specifically includes:

measuring the relation between the deformation of the test piece and the shot blasting time under different shot blasting strengths by using an Almen measuring instrument;

taking the variable vector of the test piece as a longitudinal axis and the shot blasting time as a horizontal axis, and drawing saturation curves under different shot blasting intensities;

the step c is specifically as follows: and storing the corresponding relation among the residual stress field, the shot blasting intensity, the shot blasting time and the deformation of the test piece and the saturation curves under different shot blasting intensities.

5. An ultrasonic shot peening method according to claim 1, wherein in the step B, specifically:

and simulating and calculating the required residual stress field distribution by using finite element software according to the deformation requirement.

6. An ultrasonic peening method according to claim 1, wherein the database further stores a correspondence between a plurality of peening parameter combinations and peening intensities, the peening parameter combinations including at least two of amplitude, material of the striker, diameter of the striker, distance between the striker and the surface of the metal member, and air pressure;

the step D is followed by a step E: and determining the shot blasting parameter combination according to the shot blasting intensity corresponding to the residual stress field distribution meeting the preset requirement searched from the database.

7. An ultrasonic shot peening shape correction device, comprising:

the acquisition module is used for acquiring the deformation requirement of the surface of the metal part;

the simulation module is used for simulating and calculating the required residual stress field distribution according to the deformation requirement of the surface of the metal component obtained by the acquisition module;

the first comparison module is used for comparing the calculated residual stress field distribution with residual stress field distributions stored in a database and screening out residual stress field distributions meeting preset requirements from the database, wherein the database stores corresponding relations among the residual stress field distributions, shot blasting strength, shot blasting time and deformation of a test piece, and the material of the test piece is the same as that of the metal part;

the first judgment module is used for receiving the structure of the first comparison module and judging whether residual stress field distribution meeting the preset requirement exists in a database;

and the first searching module is used for receiving the judgment result of the judging module, and searching the corresponding shot blasting intensity and shot blasting time from the database according to the residual stress field distribution meeting the preset requirement if the residual stress field distribution meeting the preset requirement is judged to exist in the database.

8. The ultrasonic peening apparatus of claim 7, further comprising a second judging module and a selecting module;

the second judging module is used for judging the number of the residual stress field distributions meeting the preset requirements screened from the database;

the selection module is used for selecting one residual stress field distribution which meets the set requirement from a plurality of residual stress field distributions which meet the preset requirement.

9. An ultrasonic peening apparatus according to claim 7, further comprising a second lookup module for looking up a peening parameter combination from the database based on the peening intensity looked up by the first module.

10. An ultrasonic shot-peening apparatus to which the ultrasonic shot-peening method according to any one of claims 1 to 6 is applied, comprising:

an ultrasonic generator and an ultrasonic transducer (1);

the device comprises a vibrating body (2) and at least one striker (3), wherein the vibrating body (2) is connected with the ultrasonic transducer (1), and the rapping body is used for impacting the striker (3) to eject the striker.

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