CN113843344A - Chordwise shot blasting forming method for wallboard with thickness mutation area - Google Patents
Chordwise shot blasting forming method for wallboard with thickness mutation area Download PDFInfo
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- CN113843344A CN113843344A CN202111098154.5A CN202111098154A CN113843344A CN 113843344 A CN113843344 A CN 113843344A CN 202111098154 A CN202111098154 A CN 202111098154A CN 113843344 A CN113843344 A CN 113843344A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/06—Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering, beating, peen forming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21D53/92—Making other particular articles other parts for aircraft
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Abstract
A chord shot blasting forming method for a wallboard with a thickness mutation area comprises the equal thickness area and the thickness mutation area, wherein the thickness of the thickness mutation area of the wallboard is larger than that of the equal thickness area, enough chord shot blasting prestress flat plate test pieces of the thickness mutation area of the wallboard are manufactured, a shot blasting test method of the flat plate test pieces is designed, a pre-bending clamping shot blasting test of the test pieces is carried out, and proper clamping prestress of the thickness mutation area of the wallboard is obtained according to an experiment result; designing a chord-wise shot blasting path and specific shot blasting parameters continuously passing through the equal-thickness area and the thickness mutation area of the wallboard, pre-bending and clamping the thickness mutation area of the wallboard, and carrying out chord-wise shot blasting on the equal-thickness area and the thickness mutation area of the wallboard through the continuous shot blasting path by adopting the shot blasting process parameters of the equal-thickness area of the wallboard.
Description
Technical Field
The invention belongs to the field of aircraft manufacturing, further belongs to the field of shot blasting forming processing of wing wallboards, and particularly relates to a chordwise shot blasting forming method of a wing wallboard containing a thickness mutation region.
Background
With the complication of wing panel construction, there are often multiple small areas of thickening thereon. Compared with the equal-thickness area, the thickened area has the advantages that the shape curvature does not change suddenly, and only the thickness is increased suddenly. Therefore, the local small-scale thickened area is called a thickness mutation area, as shown in the attached figure 1. The design of the shot-peening method for each area of the wing panel is mainly based on the material characteristics of the panel and the factors such as the thickness, the structure, the shape curvature and the like of the area. Wherein, the larger the material thickness is, the more difficult the forming is. Because the thickness of the material of the thickness mutation area is thicker and the thickness mutation area and the surrounding equal thickness area are in the mutation transition structure, the shot blasting forming difficulty of the thickness mutation area and the surrounding equal thickness area is greatly increased.
The design of the shot-peening method requires the design of shot-peening parameters, shot-peening paths, and pre-stressing. The peening parameters include shot type ρ, peening distance l, shot flow f, peening pressure p, and peening velocity v. In the shot-peening process, shot-peening is performed along a designed shot-peening path with designed shot-peening parameters in a designed prestressed state. In the wall plate shot-peening, generally, chord-wise shot-peening and span-wise shot-peening are performed separately. At present, the problems of the shot peening forming of the wall plate with the multi-thickness abrupt change area mainly focus on the chord shot peening forming, and particularly:
(1) because the thickness of the material is suddenly changed, if the chord shot blasting forming is carried out on the wall plate thickness sudden change area and the equal thickness area by using the same shot blasting parameters, the shape curvature can not meet the requirement.
The influence of the material thickness t on the radius of curvature R of the formed profile is of the order of the square. The material was shaped with the same parameters for thickness t and 2t, resulting in a shaped radius of curvature of R and 4R. Therefore, chord shot peening using the same parameters results in abrupt changes in the curvature of the region of abrupt thickness and the region of equal thickness. The required shape curvature is smooth transition, so the formed shape curvature can not meet the requirement. The curvature and the radius of curvature are inverse relationships.
(2) If different peening parameters are used for respectively peening the thickness mutation area and the equal thickness area, the peening path is very complicated, the process design difficulty is high, and the forming risk is high.
When different peening parameters are used for performing chordwise peening, the thickness mutation region needs to be bypassed firstly during the path planning of the peening to complete the peening of the equal thickness region, and then the thickness mutation region needs to be peened separately. However, the thickness jump area is small in area and large in number, and in order to bypass the thickness jump area, the chord-wise shot blasting path of the equal thickness area cannot be planned according to the optimal scheme. And the path near the thickness mutation area is intricate and complex, so that the formed curvature of the wallboard is difficult to predict in design, and the forming risk is high in actual processing.
(3) If the independent local shot blasting forming is carried out on the thickness mutation area and the equal thickness area, the processing operation is complicated and the forming effect is not ideal.
Performing chord-wise shot blasting forming on the thickness mutation area and the equal thickness area respectively, wherein a shot blasting path can be planned according to an optimal scheme, but six steps are required: protecting the thickness mutation region → carrying out chordwise integral shot blasting → dismantling protection → protecting the equal thickness region around the thickness mutation region → respectively shot blasting each thickness mutation region → dismantling protection. The method has long process design time and complex processing operation, and the shapes of the thickness mutation area and the equal thickness area can not be smoothly transited, so the forming effect is poor.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a chordwise shot peening forming method for a wallboard with a thickness mutation area.
A chord shot-peening forming method for a wallboard with a thickness mutation area, wherein the wallboard comprises an equal thickness area and the thickness mutation area, the thickness of the thickness mutation area of the wallboard is larger than the thickness of the equal thickness area, and shot-peening parameters of the equal thickness area of the wallboard are known, and the method is characterized by comprising the following steps of: 1) manufacturing enough chord shot blasting prestress flat plate test pieces of the wall plate thickness mutation areas, wherein the thickness of the test pieces is consistent with the wall plate thickness mutation areas, the length direction of the test pieces is consistent with the chord direction of the wall plate, the length and the width of the test pieces meet the curvature measurement requirements of the test pieces, the length of the test pieces at least meets the distance between two shot blasting paths, and the material of the test pieces is the same as that of the wall plate; 2) designing a shot blasting test method of a flat plate test piece, wherein shot blasting parameters of a prestressed flat plate test piece are the same as chord-wise shot blasting parameters of a wall plate equal-thickness area, shot blasting paths of the test piece are required to be vertically and uniformly distributed in the length direction of the test piece, the length direction of the test piece at least comprises two shot blasting paths, chord-wise prestress is determined to be applied to the test piece according to the shot blasting parameters of the test piece and the thickness of the thickness mutation area, when the prestress is applied, force is applied to the middle part of the inner surface of the test piece, force is applied to two ends of the outer surface of the test piece simultaneously, and the test piece is pre-bent into a single-curved surface; 3) carrying out pre-bending clamping shot blasting test on the test pieces, respectively applying different pre-stresses to a plurality of same test pieces to carry out chord pre-bending clamping, respectively carrying out shot blasting test on the process parameters selected from the range of shot blasting process parameters of the equal-thickness area, measuring chord curvature of the plurality of test pieces after shot blasting, and obtaining proper clamping pre-stress of the wall plate thickness mutation area according to the test result; 4) designing a chord-wise shot blasting path continuously passing through the equal-thickness area and the thickness mutation area of the wall plate and specific shot blasting parameters. 5) Pre-bending and clamping the wall plate thickness mutation region according to the clamping prestress of the thickness mutation region obtained in the step 3), and performing chord-wise shot blasting on the wall plate thickness mutation region and the wall plate thickness mutation region in a continuous shot blasting path by adopting shot blasting process parameters of the wall plate thickness mutation region.
If the wallboard comprises a plurality of thickness mutation areas, a test piece and a pre-bending clamping shot blasting test are respectively manufactured corresponding to each thickness mutation area, the clamping prestress suitable for each thickness mutation area is respectively obtained, the pre-bending clamping is respectively carried out on each thickness mutation area by adopting the corresponding clamping prestress when the wallboard is subjected to shot blasting, and then the chord shot blasting is carried out on the equal-thickness areas of the wallboard and all the thickness mutation areas by adopting the shot blasting process parameters of the equal-thickness areas of the wallboard in a continuous shot blasting path.
When the pre-bending clamping shot blasting test of the test piece is carried out, shot blasting paths are perpendicular to and evenly distributed in the length direction of the test piece, and the length direction of the test piece at least comprises two shot blasting paths.
And performing chord-wise curvature measurement on the plurality of test pieces subjected to shot blasting to obtain a linear relation between chord-wise prestress and chord-wise curvature radius after shot blasting forming, and selecting the chord-wise prestress corresponding to the target curvature radius as the clamping prestress of the thickness mutation area.
The beneficial effect of this application lies in: the invention independently applies chord-wise prestress to each thickness mutation area on the wall plate, so that the thickness mutation areas and the equal thickness areas use the same shot blasting parameters to simultaneously carry out shot blasting forming on a primary shot blasting path in a prestress state. The aim of forming required chord-wise shape curvature in both the thickness mutation area and the equal thickness area by only performing chord-wise shot blasting forming once is achieved. Compared with the prior art, the process design and shot blasting method are simpler and more efficient, and the contour curvature qualified rate of shot blasting is higher.
The present application is described in further detail below with reference to the accompanying drawings of embodiments.
Drawings
FIG. 1 is an aircraft panel structure including a region of abrupt thickness change.
FIG. 2 is a schematic view of pre-bending and clamping a test piece in a thickness transition region.
FIG. 3 is a linear relationship between chordwise prestressing and chordwise radius of curvature after shot peening made from experimental results.
FIG. 4 is a schematic view of chord peening of a wall panel in a continuous peening path with zones of equal thickness and all zones of abrupt thickness.
The numbering in the figures illustrates: 1 wallboard, 2 equal thickness zones, 3 thickness mutation zones, 4 test pieces, 5 clamping tools and 6 shot blasting paths.
Detailed Description
Referring to the attached drawings, the chordwise shot peening forming method of the wallboard with the thickness mutation region is applied to the wallboard 1 which comprises the equal thickness region 2 and the thickness mutation region 3, and the thickness of the thickness mutation region 3 is larger than that of the equal thickness region 2 of the wallboard. The method needs the known shot blasting parameters required by the contour curvature required by forming the equal-thickness area on the wall plate: shot type ρ, shot distance l, shot flow rate f, shot pressure p, and shot velocities v1 to v2 (specific velocity v is selected according to the chordwise contour curvature of each region). The method comprises the following steps:
step 1: manufacturing a wall plate thickness mutation area chord direction shot blasting prestress flat plate test piece;
the material of the test piece is the same as that of the wallboard, and the thickness of the test piece is the same as that of the thickness mutation area of the wallboard. The length direction of the test piece is defined as the chord direction. The length and width of the test piece should satisfy the test piece curvature measurement requirement, and the length of the test piece at least satisfies the interval of two peening paths. The number of the test pieces is required to meet the data processing requirement, and the purpose of obtaining the chord-direction prestress sigma t required by forming the chord-direction shape curvature of the thickness mutation area is achieved.
Step 2: designing a shot blasting method for the flat test piece;
the shot blasting parameters of the prestressed flat plate test piece are the same as the chord-wise shot blasting parameters of the equal-thickness area of the wall plate. An appropriate peening velocity v is selected from the range of peening velocities v1 to v2 according to the chordwise contour curvature of the equal thickness region in the vicinity of the thickness transition region.
The shot blasting paths of the test piece are required to be vertically and uniformly distributed in the length direction of the test piece, and the length direction of the test piece at least comprises two shot blasting paths. The distance between the shot blasting paths is a fixed value, and the distances between the first shot blasting path and the last shot blasting path and the width end face of the test piece are smaller than half of the distance between the shot blasting paths. The distance between the shot blasting paths takes the thickness of the thickness mutation area into consideration. The smaller the shot path pitch, the smaller the radius of curvature formed.
Determining a plurality of test pieces a, b, c and c according to the shot blasting parameters of the test pieces and the thickness of the thickness mutation area. . . . . . x is respectively applied with chord-direction prestress sigma 1MPa, sigma 2MPa, sigma 3 MPa. . . . . . Sigma xMPa. It is required that σ 1< σ 2< σ 3. . . . . . σ x. And the empirical [ sigma 1, sigma x ] range is to include the possible pre-stress values that can shape the curvature of the profile of the thickness jump zone with the trial peening parameters. When prestress is applied, force is applied to the middle of the inner surface of the test piece, force is applied to the two ends of the outer surface of the test piece at the same time, and the test piece is pre-bent into a single curved surface (when the outer surface is measured, the chordwise curvature is larger than 0, and the spanwise curvature is approximately equal to 0).
In summary, the tests require the chord pre-stressing force σ 1MPa, σ 2MPa, σ 3MPa, and V, in terms of shot type ρ, shot distance l, shot flow f, shot pressure p, and shot velocity v. . . . . . Under the condition of sigma xMPa, the test pieces a, b, c and c are respectively subjected to the shot blasting path. . . . . . And (x) performing shot blasting on the outer surface.
And step 3: carrying out a prestress shot blasting test on the test piece, and carrying out data processing according to an experimental result to obtain the chord prestress of the thickness mutation area;
before the test, the initial chord-wise contour curvature radius is measured on the outer surface of the test piece, after the test piece is subjected to prestress shot blasting test, the chord-wise contour curvature radius is measured on the outer surface of the test piece, and the former is subtracted from the latter to obtain the forming chord-wise curvature radius of the test piece. And fitting a linear equation R between the chordwise prestress and the chordwise curvature radius of the shot forming, wherein the linear equation R is k sigma + lambda. And when the parameters are shot type rho, shot blasting distance l, shot blasting flow f, shot blasting pressure p and shot blasting speed v, chord prestress sigma t required by chord-wise shape curvature of the thickness mutation area is formed by calculation according to the equation.
If a plurality of thickness mutation areas exist on the wall plate, the steps 1 to 3 are respectively carried out to determine the chord direction shot blasting parameters and chord direction prestress of each thickness mutation area.
And 4, step 4: designing the chord-wise shot blasting path and the shot blasting speed of each path continuously passing through the equal-thickness area and the thickness mutation area of the wall plate.
The overall chord-wise peening parameters are determined by the type rho of the shot, the peening distance l, the flow f of the shot, the peening pressure p and the peening speeds v 1-v 2. The wall plate integral chord direction shot blasting parameter design and the shot blasting path design have a mature method, and the patent still adopts the traditional method, and the details are not repeated. It should be noted that in designing the chord-wise peen path of the panel, the path of the abrupt thickness change region and the surrounding equal thickness region should be continuous. The peening speed V of the thickness mutation area is determined, and the other areas need to be selected from V1-V2 according to the thickness and the curvature of the areas. The distance between the shot blasting paths of the thickness mutation areas is the same as the shot blasting paths of the flat plate test piece.
And 5: pre-bending the wall plate thickness mutation area 3, and performing wall plate chord-direction shot blasting.
And (4) pre-bending and clamping the thickness abrupt change region of the wallboard according to the chord-direction prestress of the thickness abrupt change region determined in the step (3). And (4) performing chord-wise shot blasting on the equal-thickness area and the thickness mutation area of the wall plate in a continuous shot blasting path according to the shot blasting path and the shot blasting parameters in the step 4. The chord-wise shape curvature of the thickness abrupt change area and the equal thickness area can be formed at one time.
The method is described in detail with respect to chord shot peening of the panel of FIG. 1. The present embodiments are merely illustrative of specific embodiments of the present method and should not be construed as limiting the applicability of the present method.
Panel 1 is summarized as follows: the wallboard is made of 2024-T351 aluminum alloy, the size is 4500mm multiplied by 950mm, the thickness of the equal-thickness area 2 (except for the thickness mutation area) is 7mm, the whole wallboard is of a biconvex shape, the chordwise curvature radius is 7-10 m, and the spanwise curvature is 400 m. One of the thickness transition regions 3 has dimensions of 340mm by 90mm, a thickness of about 12mm and a chord-wise radius of curvature of about 8 m. The thickness abrupt change region 3 only has an abrupt change in thickness, and the outline curvature is the same as that of the surrounding equal thickness region 2. The steps 1 to 5 are only specifically described for the chord-wise shot blasting parameters and the chord-wise prestressing force design method of the thickness mutation region 3, and the design methods of the remaining thickness mutation regions are similar and are not repeated herein.
The thickness of the equal-thickness area 2 of the wallboard is 7mm, the chordwise curvature radius is 7-10 m, and the following peening parameters are selected according to the past peening forming experience of the 2024-T351 aluminum alloy wallboard to carry out equal-thickness area peening: the method comprises the steps of APB1/8 carburizing steel shots, wherein the shot blasting distance is 500mm, the shot blasting flow is 8Kg/min, the shot blasting pressure is 0.16MPa, and the shot blasting speed is 5-10 m/min.
Step 1: manufacturing a wall plate thickness mutation area 3 chord direction shot blasting prestress flat plate test piece;
the thickness of the wall plate thickness mutation area 3 is 12mm, and the material is 2024-T351 aluminum alloy. Considering the curvature measurement using a curometer with a span of 200, the shot path pitch was 80mm, and therefore, three 2024-T351 aluminum alloy test pieces a, b, and c, each having a length, width, and thickness of 200mm × 220mm × 12mm, were designed.
Step 2: designing a shot blasting method for the flat test piece;
the following shot blasting parameters of the prestress test piece 4 are the same as the chord-wise shot blasting parameters of the wall plate: APB1/8 carburized steel shots, the shot blasting distance is 500mm, the shot flow is 8Kg/min, and the shot blasting pressure is 0.16 MPa. The chord-wise contour curvature of the equal-thickness area near the thickness mutation area is 7.3-8.8, so that the shot blasting speed of the thickness mutation area is selected to be 6m/min from the range of 5-10 m/min. The chordwise prestressing applied by the test pieces a, b and c is selected to be 18MPa, 12MPa and 6MPa respectively.
The prestressed test piece 4 is subjected to chord prestress by the clamping tool 5, and shot blasting is performed on the outer surface of the test piece in a predicted shot blasting path in the clamped state of the chord prestress as shown in fig. 2.
And step 3: carrying out a prestress shot blasting test on the test piece, and carrying out data processing according to an experimental result to obtain the chord prestress of the thickness mutation area;
since it is difficult to directly measure the prestress, the prestress is indirectly measured by measuring the chord-wise camber of the test piece after the prestress is applied. According to the material characteristics and the structure of the curometer, after the chord prestress applied by calculation is 18MPa, 12MPa and 6MPa, if the curometer with the span of 200mm is used, the chord arc height required to be measured is about: 0.63mm, 0.42mm, 0.21 mm. The measurement of the radius of curvature of the chordwise profile is also measured indirectly by measuring the height of the outer surface arc.
And measuring the initial chord-wise arc height before shot blasting on the outer surface of the test piece before testing. And (3) respectively carrying out shot blasting on the outer surfaces of the test pieces a, b and c according to the parameters in the step (2) in a prestressed state. After the test piece is subjected to the prestress shot blasting test, the chord direction arc height after shot blasting is measured on the outer surface of the test piece, and the chord direction shot blasting forming arc height of the test piece is obtained by subtracting the former from the latter. The test measurement data are shown in table 1.
A linear equation, R ═ 362 σ +12787, was fitted to the chordwise prestressing and chordwise peen forming radius of curvature (see fig. 3 for a scatter plot linear equation fit of experimental results). Substituting R7.5 m into equation one yields σ 14.6 MPa.
TABLE 1 prestressed shot-peening test results
In conclusion, the shot blasting parameters of the thickness mutation area 3 are as follows: APB1/8 carburized steel shots, the shot blasting distance is 500mm, the shot flow is 8Kg/min, the shot blasting pressure is 0.16MPa, and the shot blasting speed is 6 m/min. The chord prestress to be applied is 14.6 MPa. And (3) repeating the steps 1 to 3 respectively to obtain the shot blasting speeds of other thickness mutation areas of 6m/min, 10m/min and 10m/min respectively, and the chord-direction prestress to be applied of 8.7MPa, 10.5MPa and 12.4MPa respectively.
And 4, step 4: and designing integral chord-direction shot blasting parameters and shot blasting paths which are adaptive to chord-direction shot blasting forming parameters of the thickness mutation areas.
The overall chord shot blasting parameters are as follows: the method comprises the steps of APB1/8 carburizing steel shots, wherein the shot blasting distance is 500mm, the shot blasting flow is 8Kg/min, the shot blasting pressure is 0.16MPa, and the shot blasting speed is 5-10 m. And designing chord-wise shot blasting paths of the wall plate and specific shot blasting speeds of the paths according to the thicknesses of the equal-thickness zones and the chord-wise shape curvatures of the zones. In FIG. 4, the wall structure is shown by a broken line, and the shot path 6 is shown by a solid line, and the shot velocity of the path is shown on the shot path 6.
In the embodiment, four thickness mutation areas are provided, after required chord-wise prestress of 14.6MPa, 8.7MPa, 10.5MPa and 12.4MPa is applied to each thickness mutation area, carburized steel shots APB1/8 are used, chord-wise shot blasting is carried out on the outer surface (the surface without the stringers is the outer surface) of the wallboard 1 according to a shot blasting path 6 and a shot blasting speed shown in figure 4 by using a shot blasting distance of 500mm, a shot flow of 8Kg/min and a shot blasting pressure of 0.16MPa, and the chord-wise shape curvature of the wallboard can be formed at one time.
Claims (4)
1. A chord shot-peening forming method for a wallboard with a thickness mutation area, wherein the wallboard comprises an equal thickness area and the thickness mutation area, the thickness of the thickness mutation area of the wallboard is larger than the thickness of the equal thickness area, and shot-peening parameters of the equal thickness area of the wallboard are known, and the method is characterized by comprising the following steps of: 1) manufacturing enough chord shot blasting prestress flat plate test pieces of the wall plate thickness mutation areas, wherein the thickness of the test pieces is consistent with the wall plate thickness mutation areas, the length direction of the test pieces is consistent with the chord direction of the wall plate, the length and the width of the test pieces meet the curvature measurement requirements of the test pieces, the length of the test pieces at least meets the distance between two shot blasting paths, and the material of the test pieces is the same as that of the wall plate; 2) designing a shot blasting test method of a flat plate test piece, wherein shot blasting parameters of a prestressed flat plate test piece are the same as chord-wise shot blasting parameters of a wall plate equal-thickness area, shot blasting paths of the test piece are required to be vertically and uniformly distributed in the length direction of the test piece, the length direction of the test piece at least comprises two shot blasting paths, chord-wise prestress is determined to be applied to the test piece according to the shot blasting parameters of the test piece and the thickness of the thickness mutation area, when the prestress is applied, force is applied to the middle part of the inner surface of the test piece, force is applied to two ends of the outer surface of the test piece simultaneously, and the test piece is pre-bent into a single-curved surface; 3) carrying out pre-bending clamping shot blasting test on the test pieces, respectively applying pre-stresses with different sizes to a plurality of same test pieces to carry out chord pre-bending clamping, respectively carrying out shot blasting test on the process parameters selected from the shot blasting process parameter range of the equal-thickness area, carrying out chord curvature measurement on the plurality of test pieces after shot blasting, and obtaining the proper clamping pre-stress of the wall plate thickness mutation area according to the test result; 4) designing a chord-wise shot blasting path continuously passing through the equal-thickness area and the thickness mutation area of the wall plate and specific shot blasting parameters. 5) Pre-bending and clamping the wall plate thickness mutation region according to the clamping prestress of the thickness mutation region obtained in the step 3), and performing chord-wise shot blasting on the wall plate thickness mutation region and the wall plate thickness mutation region in a continuous shot blasting path by adopting shot blasting process parameters of the wall plate thickness mutation region.
2. The chordwise shot-peening method of wallboard with thickness jump zones as claimed in claim 1, wherein the wallboard comprises a plurality of thickness jump zones, a test piece and a pre-bending clamping shot-peening test are respectively made corresponding to each thickness jump zone, clamping prestress of each thickness jump zone is respectively obtained, corresponding clamping prestress is respectively adopted for pre-bending clamping of each thickness jump zone during the shot peening of the wallboard, and then the chordwise shot peening is carried out on the equal thickness zones of the wallboard and all the thickness jump zones in a continuous shot-peening path by adopting the peening process parameters of the equal thickness zones of the wallboard.
3. The chordwise shot peening method of wallboard with thickness jump of claim 1, wherein when pre-bending clamping shot peening test is performed on the test piece, the shot peening paths are vertically and uniformly distributed in the length direction of the test piece, and the length direction of the test piece comprises at least two shot peening paths.
4. The chord shot blasting method of a wall panel with a thickness jump according to claim 1, wherein chord curvature measurements are performed on a plurality of test pieces after shot blasting to obtain a linear relationship between chord prestress and chord curvature radius after shot blasting, and chord prestress corresponding to a target curvature radius is selected as the clamping prestress of the thickness jump.
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| CN115635004A (en) * | 2022-11-07 | 2023-01-24 | 中国航空制造技术研究院 | Shot blasting forming method for saddle-shaped ribbed wallboard |
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| CN112417666A (en) * | 2020-11-17 | 2021-02-26 | 中国航空制造技术研究院 | Numerical simulation method for prestressed shot blasting forming of ribbed wallboard |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115635004A (en) * | 2022-11-07 | 2023-01-24 | 中国航空制造技术研究院 | Shot blasting forming method for saddle-shaped ribbed wallboard |
| CN115635004B (en) * | 2022-11-07 | 2024-02-23 | 中国航空制造技术研究院 | Shot blasting forming method for saddle-shaped ribbed wallboard |
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