CN114186729A - Polycrystalline material plate frame part finish machining method based on internal residual stress nondestructive measurement - Google Patents
Polycrystalline material plate frame part finish machining method based on internal residual stress nondestructive measurement Download PDFInfo
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Abstract
The invention provides a polycrystalline material plate frame piece finish machining method based on nondestructive internal residual stress measurement, and solves the problem of deformation out-of-tolerance in the existing polycrystalline material plate frame piece machining. The method mainly comprises the steps of nondestructively detecting residual stress and distribution of different parts in a metal plate to be machined, identifying a residual stress risk area causing deformation out-of-tolerance, designing a machining envelope, cutting a planned machining path and sequentially cutting the plate by calculating the envelope with the minimum deformation, measuring and evaluating whether the deformation is out-of-tolerance and the like, and optimizing the cutting machining process. The method of testing, theoretical analysis and actual measurement of the machining deformation is adopted for solving the problems, the cost in the aspects of labor, financial resources, time and the like can be greatly reduced, and the method has good economic benefit.
Description
Technical Field
The invention relates to the field of precision workpiece processing, in particular to a polycrystalline material plate frame piece finish machining method based on internal residual stress nondestructive testing.
Background
With the development of modern manufacturing industry, the requirements on the performance of workpieces related to the precision machining field of aviation, aerospace and the like are continuously improved, and higher requirements are provided for the structural design of the workpieces. For example, in order to reduce the weight of an airplane and ensure excellent aerodynamic performance, the original structural mode of connecting an aluminum alloy plate frame piece, a skin and a bolt is eliminated, the novel integral structural component is widely applied to airplane equipment, the integral structural components such as an integral wall plate, a crossbeam and a spacer frame are gradually adopted, and the processing deformation control of the metal and alloy plate frame piece becomes the key of manufacturing and processing.
The integral structural member is not formed by simply combining parts, but is formed by processing an integral blank and a plate. When the weak rigidity parts such as plate frame parts are integrally processed, the deformation is easy to occur due to various reasons such as residual stress, cutting force, cutting heat and the like of the plates, the processing rejection rate is high, and the production progress is influenced. Among them, the improper residual stress of the (pre-stretched) aluminum sheet is one of the main causes of the deformation of the parts including the aluminum alloy sheet frame. Moreover, because the residual stress distribution of different parts of the plate is different, different processing paths are adopted to have different influences on processing deformation. In the prior art, whether the actual deformation reaches the standard can be tested only by randomly selecting a machining path, so that the trial and error cost is high, and the rejection rate is high.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a method for fine machining a polycrystalline material plate frame based on nondestructive internal residual stress measurement, which solves the problem of deformation tolerance in the existing polycrystalline material plate frame machining.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
A polycrystalline material plate frame piece finish machining method based on internal residual stress nondestructive testing comprises the following steps:
1. the polycrystalline material plate frame piece finish machining method based on the nondestructive internal residual stress measurement is characterized by comprising the following steps of:
s1, collecting data: nondestructive testing the residual stress and the distribution thereof at different parts inside the metal plate to be processed;
s2, identifying a risk zone: identifying a residual stress risk zone based on the residual stress data collected in step S1;
s3, designing and processing an envelope surface: designing a machining envelope surface of each risk area identified in the step S2 on the metal plate to be machined on the basis of a product workpiece design drawing, wherein all the machining envelope surfaces are cut to obtain the product workpiece, and any machining envelope surface is not intersected with other risk areas;
s4, according to the arrangement of different cutting sequences of the machined envelope surface obtained in the step S3, based on a stress balance principle (namely Sigma F = 0) and a moment balance principle (namely Sigma M = 0), deformation caused by various different cutting sequences can be obtained through calculation, and the envelope surface cutting sequence with the minimum deformation obtained through calculation is used as an actual machining path;
s5, cutting the plate: after cutting all marked risk areas on the metal plate to be processed according to the actual processing path determined in the step S4, firstly, roughly processing and cutting a product workpiece (the processing allowance is recommended to be 0.5 mm-5 mm) on the residual plate according to a product diagram, then, finely processing and cutting the product according to the product diagram to obtain a processed plate frame piece, and measuring the actual deformation of the obtained product workpiece;
s6, evaluation: and comparing the actual deformation measured in the step S5 with the qualified tolerance requirement required by the workpiece of the product, and judging whether the processed product is qualified.
Preferably, the risk zones include areas of high tensile stress where residual stress is excessive, areas of high compressive stress where residual stress is excessive, and areas of high stress gradient where stress changes are excessive per unit length. More preferably, said risk zones comprise regions of high tensile stress in which said residual stress is higher than a preset value (for example a tensile stress of a preset value of 50MPa for pre-stretched aluminium sheet), regions of high compressive stress higher than a preset value (for example a compressive stress of a preset value of 50MPa for pre-stretched aluminium sheet) and regions of high stress gradient in which the stress variation per unit length is greater than a preset value (for example a stress gradient of a preset value of 40MPa/cm for pre-stretched aluminium sheet). The areas which are possibly subjected to deformation risks after machining are identified through the stress distribution characteristics, the near-optimal machining path can be obtained more efficiently, the preset value can be determined according to the requirements of the metal plate to be machined and the product workpiece and the empirical value of the stress in similar machining in the prior art, and the lower the preset value is, the more the risk areas are relatively more, and the less the risk areas are otherwise.
Preferably, in step S3, the designed machining envelope surface is a smooth curved surface.
Preferably, in step S3, the designed machining envelope penetrates through the sheet material in the thickness direction.
Particularly preferably, the theoretical deformation of the residual plates obtained after machining of each arranged cutting sequence is calculated, and the cutting sequence corresponding to the calculated minimum theoretical deformation is selected as an actual machining path, namely, the theoretically optimal machining path is obtained through theoretical simulation calculation, so that high cost and rejection rate caused by blind trial and error are further avoided.
Preferably, on the basis of the qualified dimension judgment standard, the following principle is adopted:
in step S6, when the actual deformation measured in step S5 is less than or equal to the qualified dimension tolerance requirement of the product, the processed product is directly judged to be qualified, and the processing path determined in step S4 is judged to be qualified，And is applied to the processing of the metal plates to be processed in the same batch;
in step S6, when the actual deformation measured in step S5 is larger than the acceptable dimensional tolerance requirement of the product, or when the risk zone identified according to step S2 fails to obtain a machining envelope meeting the requirement according to step S3, the machining envelope is determined as defective, and the following steps are added:
and step S7, re-determining the risk zone, repeating the steps S2-S5, and judging whether the risk zone is qualified again.
Preferably, the re-determination of the risk zone is by reducing the preset values of the high tensile stress zone, the high pressure stress zone and/or the high stress gradient zone.
In addition, when the processing envelope surface meeting the requirement can not be obtained according to the step S3 according to the risk zone identified in the step S2, the following steps are added: step S7, re-determining the risk zone, i.e. re-determining the risk zone by increasing the preset values of the high tensile stress region, the high compressive stress region and/or the high stress gradient region, and repeating steps S2-S5 to judge whether the risk zone is qualified again.
Because the performance of different batches of plates is different and the requirements of product workpieces are different, when a processing path meeting the requirements is obtained according to the method disclosed by the invention, the plates can be qualified and directly applied to the same batch of plates, and the actually optimal processing path is not necessarily found, so that the qualified processing products can be obtained more quickly and efficiently, and higher trial and error cost is avoided. When the qualified processing path is not obtained, the method can be repeated by adjusting the preset value to the required direction until the qualified processing path is found; when the metal plate to be processed is still unqualified after the risk area is determined again and the preset value can not be reduced or increased, the situation that the metal plate to be processed can not process the required product workpiece can be determined as early as possible, so that the unnecessary high rejection rate caused by more wasted raw materials is avoided.
More preferably, the method for non-destructive measurement of internal residual stress and its distribution is selected from the group consisting of short-wavelength X-ray diffraction, hard X-ray diffraction with high-energy synchrotron radiation, neutron diffraction, profile method, ultrasonic method, and the like. The methods can be used for nondestructively detecting the residual stress and the distribution of the residual stress at each position in the metal plate to be detected.
Further, the metal plate to be processed may be a metal plate or an alloy plate thereof, such as a pre-stretched aluminum alloy plate, a steel plate, a copper plate, or the like.
Compared with the prior art, the invention has the following technical effects:
(1) firstly, nondestructively measuring residual stress and distribution of the residual stress at each position of a plate to be processed, determining and identifying a risk region causing processing deformation based on a stress balance principle (namely sigma F = 0) and a moment balance principle (namely sigma M = 0), and determining an envelope surface (namely a processing envelope surface) enveloping each risk region; theoretically calculating the deformation of the residual plate after each risk area is cut by each processing enveloping surface sequence, and optimizing the cutting processing sequence according to the minimum principle of the deformation of the residual plate; the method comprises the steps of obtaining a residual plate cutting machining product by utilizing the optimal cutting machining sequence, measuring the machining deformation of the product, evaluating whether the size of the product is out of tolerance or not, and directly finding the optimal machining path to the maximum extent, thereby solving the key problem of high trial and error cost caused by the blind selection of the machining path in the prior art in a breakthrough manner.
(2) For the condition that the base of the plate to be processed is not good enough or the requirement of a product workpiece is higher, the invention can judge the unqualified plate more quickly, greatly reduce the trial and error cost and the raw material waste, and even the plate of the batch can be completely processed once in the prior art to find that the plate can not be processed at all.
(3) The invention creatively adopts the combination of testing, theoretical analysis and actual measurement of machining deformation to find the optimal machining path, and the product workpiece machined by the method can ensure the optimal actual product performance to the maximum extent, obviously reduce the rejection rate and the cost, ensure and improve the size precision of the product, and reduce the occurrence of accidents such as flying hidden danger and the like caused by machining deformation.
(4) The processing method has clear flow, adopts the combination of testing, theoretical analysis and actual measurement of processing deformation, and can greatly reduce the cost in the aspects of labor, financial resources, time and the like by completing the theoretical simulation part through an intelligent program.
(5) The processing method of the invention has good economic benefit and social benefit.
Drawings
FIG. 1 is a schematic flow diagram of a method for finishing a frame piece of polycrystalline material based on non-destructive measurement of internal residual stress according to the present invention;
FIG. 2 is a schematic three-dimensional cutting path of the L-shaped plate frame member of example 1;
FIG. 3 is a schematic cross-sectional cutting path of the L-shaped plate frame member of example 1;
fig. 4 is a schematic three-dimensional cutting path of the cylindrical plate frame of example 2;
fig. 5 is a schematic cross-sectional cutting path of the cylindrical plate frame of example 2.
The reference symbols in the above figures are: 1. a risk zone; 2. cutting an envelope surface path; 3. a product cutting path; 4. cutting off the risk area part; 5. cutting off a part of the product; 6. an L-shaped plate frame member; 7. a risk zone A; 8. a risk zone B; 9. a risk zone C; 10. cutting an envelope surface path A; 11. cutting an envelope surface path B; 12. cutting an envelope path C; 13. a product cutting path A; 14. cutting off part of the risk area A; 15. cutting off part of the risk area B; 16. cutting off the part of the risk area C; 17. cylindrical plate frame member.
Detailed Description
The invention is further described with reference to the following figures and specific examples. The following embodiments are merely provided to help understanding the principles and the core ideas of the present invention, and do not limit the scope of the present invention. It should be noted that, for those skilled in the art, modifications, replacements, or other improvements to the whole or each technical feature of the present invention without departing from the principle of the present invention also fall within the protection scope of the present invention, and the specific protection scope thereof is subject to the description of the claims.
The nondestructive testing method of residual stress and distribution thereof in the sheet material involved in the present invention includes, but is not limited to, short wavelength X-ray characteristic diffraction method (see Zhenglin, road length, Zhangjin, etc.. research on residual stress and uniformity of crystal grain orientation in the interior of a pre-stretched thick aluminum sheet [ J ]. precision forming Engineering, 2014, 6(5):9., "Zhenglin, Zhangin, what light, etc.. short wavelength X-ray diffraction method nondestructively measures residual stress in the interior of an aluminum sheet [ J ]. precision forming Engineering, 2011(2): 6.", etc.), high energy synchrotron X-ray diffraction method (see Ganguls S, Stelmukh V, Edwards L, et Al. Analysis of residual stress in metal-insert-gas-bonded Al-2024 using neutron and synchrotron X-ray diffraction method [ J ]. Materials Science A, 2008, 491(1-2):248-257. et al), neutron diffraction (see Robinson J S, Tanner D A, Truman C E, et al, Measurement and Prediction of mechanical Induced diffraction of reactive Stress in the Aluminum Alloy 7449[ J ]. Experimental machinery, 2011, 51(6):981-993. et al), profile (see Li Y N, Zhang Y A, Li X W, et al, reactive Stress Analysis in a qualified Aluminum Alloy Plate Using the contact [ C ]// Materials Science, 2016. et al), ultrasonic (see Jade, Nippon UK, Syngnan, etc.: 7050 and 7075. the Residual of the Aluminum Alloy [ C ]// Materials Science, J.: 2019, 75: 9-75. quenching test for physical Stress in the slab [ J ]: 2019, 9-75. et al), these methods are well known to those skilled in the art and may be performed by reference to the descriptions of other similar references, in addition to those listed in the present invention, without affecting the practice of the present invention.
The plates to be processed, which are involved in the invention, include but are not limited to aluminum plates, aluminum alloy plates, steel plates and the like, and are used for workpieces involved in the precision processing fields of aviation, aerospace and the like (see document ambition. analysis of machining deformation of aviation thin-wall parts based on residual stress [ D ]. Nanjing aerospace university, 2004., Chengcpeng Qiang, Zhai Zhi, Liuming, and the like. In addition to the references listed in the present invention, reference may also be made to the descriptions of other similar references without affecting the practice of the present invention.
The method for calculating the deformation amount of the remnant sheet by simulation based on the principle of stress balance (i.e. Σ F = 0) and the principle of moment balance (i.e. Σ M = 0) according to different processing paths is well known to those skilled in the art, and is referred to in documents such as "basic research on initial residual stress of an aviation aluminum alloy slab and its influence on milling deformation".
The 3 embodiments take the processing of aluminum alloy plate frames as an example, and similarly, the method can also be used for the precise processing of polycrystalline plate frames such as other metal plates, metal matrix composite plates, ceramic plates and the like.
Example 1
As shown in fig. 2 and 3, the sheet metal to be processed used in this embodiment is 2024-T351 pre-stretched aluminum plate, and the dimensional tolerance required for the L-shaped sheet frame member is ± 0.20mm, and the finishing method according to the present invention is performed by the following steps:
s1, collecting data: non-destructive testing of residual stress and distribution of residual stress at different parts of the pre-stretched aluminum plate to be processed by adopting a short-wavelength characteristic X-ray diffraction method (the specific testing method is referred to in the reference of 'non-destructive testing of residual stress in the aluminum plate by short-wavelength X-ray diffraction' and the like);
s2, identifying a risk zone: analyzing the distribution characteristics of residual stress in the plate based on the stress data collected in the step S1, and identifying a high-tensile stress area with the residual stress higher than 100MPa, a high-pressure stress area and an area with the stress gradient higher than 50MPa/mm as risk areas 1;
s3, designing and processing an envelope surface: designing a processing envelope surface (penetrating through the plate in the thickness direction) completely enveloping the risk area 1 marked in the step S2 at the peripheral part of the marked risk area 1, namely in the area of the plate to be processed except the marked risk area 1, based on an L-shaped plate frame element design drawing, wherein the processing envelope surface is a cylindrical surface;
s4, simulating cutting along a designed cutting envelope surface path 2 according to the processing envelope surface designed in the step S3, calculating theoretical deformation of the residual plate based on a stress balance principle (namely sigma F = 0) and a moment balance principle (namely sigma M = 0) according to a cutting risk area part 4 between the risk area 1 and the cutting envelope surface path 2, and performing simulation calculation by referring to a method recorded in 'basic research on initial residual stress of an aviation aluminum alloy plate and influence of the initial residual stress on milling deformation';
s4-1, based on the simulation calculation of the step S4, selecting the cutting sequence with the minimum deformation as an actual processing path;
s5, cutting the plate: after cutting all the marked risk areas 1 on the metal plate to be processed according to the actual processing path determined in the step S4, roughly cutting a product (the processing allowance is recommended to be less than or equal to 5 mm) on the residual plate according to a product drawing, then cutting the product according to the product cutting path 3, cutting a product part cut part 5, and measuring the actual deformation of the L-shaped plate frame element 6 obtained after cutting to be +/-0.15 mm;
s6, evaluation: and S5, the actual machining deformation +/-0.15 mm of the L-shaped plate frame element 6 measured in the step is smaller than the dimensional qualified tolerance +/-0.2 mm required by the product workpiece, and the qualified product workpiece can be obtained by directly judging that the batch of pre-stretched aluminum plate materials are machined according to the machining path.
Example 2
As shown in fig. 4 and 5, the sheet metal to be processed used in this embodiment is 7050-T7451 pre-stretched aluminum sheet, and the dimensional tolerance required for the cylindrical sheet frame member is ± 0.10mm, and the finishing method according to the present invention is performed by the following steps:
s1, collecting data: nondestructive testing the internal residual stress and the distribution thereof at different parts of the metal plate to be processed by an ultrasonic method;
s2, identifying a risk zone: and analyzing the distribution characteristics of residual stress in the plate based on the stress data acquired in the step S1, and setting and identifying a high-tensile stress area, a high-pressure stress area and a stress gradient area with the residual stress higher than a preset value of 70MPa, wherein the stress gradient area with the preset value higher than 35MPa/mm is a risk area, and the risk areas in the embodiment are three risk areas, namely a risk area A6, a risk area B7 and a risk area C8.
S3, designing and processing an envelope surface: on the basis of a cylindrical plate frame piece design drawing, 3 processing enveloping surfaces (penetrating through the plate in the thickness direction) respectively and completely enveloping the marked risk zone A7, the risk zone B8 and the risk zone C9 in the step S2 are designed on the plate to be processed, namely in the region of the plate to be processed except the marked risk zone, the processing enveloping surfaces are all cylindrical surfaces, all the processing enveloping surfaces are cut to be enough to obtain product workpieces, and the peripheral surfaces of the enveloping surfaces do not have any intersection with the risk zone;
s4, according to the machining envelope designed in step S3, cutting 3 machining envelopes along the designed cutting envelope path a10, cutting envelope path B11 and cutting envelope path C12, respectively, calculating theoretical deformation amounts of the remaining plate machined in 6 cutting sequences based on a stress balance principle (i.e., Σ F = 0) and a moment balance principle (i.e., Σ M = 0) by arranging 6 cutting sequence modes, wherein a cutting risk region a portion 14 is between the risk region a7 and the cutting envelope path a10, a cutting risk region B portion 15 is between the risk region B8 and the cutting envelope path B11, and a cutting risk region C portion 16 is between the risk region C9 and the cutting envelope path C12;
s4-1, sorting the theoretical deformation of the 6 residual plates based on the simulation calculation in the S4 step according to the size, and selecting the cutting sequence with the minimum deformation as the actual processing path;
s5, cutting the plate: after cutting all the marked risk areas A7, B8 and C9 on the metal plate to be processed according to the actual processing path determined in the step S4, roughly cutting products (the processing allowance is recommended to be 0.5 mm) on the residual plate according to a product diagram, then cutting the cylindrical plate frame piece according to the product cutting path A13, and measuring to obtain the actual processing deformation of the cylindrical plate frame piece 17 to be +/-0.13 mm;
s6, evaluation: the actual machining deformation +/-0.13 mm of the cylindrical plate frame 17 measured in the step S5 is greater than the qualified tolerance of the required dimension of the product workpiece by 0.10mm, and the actual deformation of the cylindrical plate frame 17 is greater than the required tolerance and is unqualified;
s7, re-determining the risk area: and (4) reducing the preset values of the high-tensile stress area and the high-pressure stress area to 40MPa, and the preset value of the high-stress gradient area to 25MPa/mm, re-determining the risk area, repeating the steps S2-S6, obtaining the actual machining deformation of the cylindrical plate frame element again to be +/-0.09 mm which is less than the qualified tolerance +/-0.10 mm required by the product workpiece, and judging that the qualified product workpiece can be obtained by machining the batch of pre-stretched aluminum plates according to the re-determined machining path.
Example 3
The sheet metal to be machined used in this example was a pre-stretched aluminum sheet of example 2, also 7050-T7451, and the workpiece to be machined was a cylindrical sheet frame of example 2, except that the dimensional tolerance was ± 0.01mm, and the finishing method according to the present invention was the same as example 2, except that:
(1) s1, collecting data: nondestructive testing the internal residual stress and distribution of different parts of the metal plate to be processed by a neutron diffraction method;
(2) s7, re-determining the risk area: and after the preset values of the high-tensile stress area and the high-pressure stress area are reduced to 25MPa and the preset value of the high-stress gradient area is reduced to 15MPa/mm, the coverage area of the processing enveloping surface of the redetermined risk area and each redetermined risk area is too large, and the cylindrical plate frame element cannot be obtained by cutting the metal plate to be processed, so that the product workpiece with the qualified size tolerance of 0.01mm cannot be processed by judging the metal plate to be processed, and the cylindrical plate frame element with the size tolerance of +/-0.01 mm can be obtained by cutting only the pre-stretched aluminum plate with smaller residual stress needing to be pulled and pressed.
Claims (12)
1. The polycrystalline material plate frame piece finish machining method based on the nondestructive internal residual stress measurement is characterized by comprising the following steps of:
s1, collecting data: nondestructive testing the residual stress and the distribution thereof at different parts inside the metal plate to be processed;
s2, identifying a risk zone: identifying a residual stress risk zone based on the residual stress data collected in step S1;
s3, designing and processing an envelope surface: designing a machining envelope surface of each risk area identified in the step S2 on the metal plate to be machined on the basis of a product workpiece design drawing, wherein all the machining envelope surfaces are cut to obtain the product workpiece, and any machining envelope surface is not intersected with other risk areas;
s4, according to the arrangement of different cutting sequences of the machined envelope surface obtained in the step S3, based on a stress balance principle (namely Sigma F = 0) and a moment balance principle (namely Sigma M = 0), deformation caused by various different cutting sequences can be obtained through calculation, and the envelope surface cutting sequence with the minimum deformation obtained through calculation is used as an actual machining path;
s5, cutting the plate: after cutting all marked risk areas on the metal plate to be processed according to the actual processing path determined in the step S4, firstly, roughly processing and cutting a product workpiece (the processing allowance is recommended to be 0.5 mm-5 mm) on the residual plate according to a product diagram, then, finely processing and cutting the product according to the product diagram to obtain a processed plate frame piece, and measuring the actual deformation of the obtained product workpiece;
s6, evaluation: and comparing the actual deformation measured in the step S5 with the qualified tolerance requirement required by the workpiece of the product, and judging whether the processed product is qualified.
2. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to claim 1, wherein: the risk zone comprises a high tensile stress region where the residual stress is too high, a high compressive stress region, and a high stress gradient region where the stress per unit length changes too much.
3. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to claim 2, wherein: the risk zones comprise regions of high tensile stress in which the residual stress is higher than a preset value (for example a tensile stress of a preset value of 50MPa for pre-stretched aluminium sheet), regions of high compressive stress above a preset value (for example a compressive stress of a preset value of 50MPa for pre-stretched aluminium sheet) and regions of high stress gradient in which the stress variation per unit length is greater than a preset value (for example a stress gradient of a preset value of 40MPa/cm for pre-stretched aluminium sheet).
4. The sheet metal frame finishing method based on nondestructive measurement of internal residual stress according to any of claims 1 to 3, characterized in that: in step S3, the designed machining envelope surface is a smooth curved surface.
5. The sheet metal frame finishing method based on nondestructive measurement of internal residual stress according to any of claims 1 to 4, characterized in that: in step S3, the designed machining envelope penetrates the sheet material in the thickness direction.
6. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to any one of claims 1 to 5, wherein:
in step S6, when the actual deformation measured in step S5 is less than or equal to the qualified tolerance requirement of the product workpiece, the processed product is directly judged to be qualified, and the processing path determined in step S4 is judged to be qualified，And is applied to the processing of the metal plates to be processed in the same batch;
in step S6, when the actual deformation measured in step S5 is greater than the acceptable tolerance requirement required by the product workpiece, it is determined as a fail, and the following steps are added:
and step S7, re-determining the risk zone, repeating the steps S2-S5, and judging whether the risk zone is qualified again.
7. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to claim 6, wherein: and re-determining the risk zone by reducing preset values (such as the preset value is reduced from 50MPa to 30MPa and from 40MPa/cm to 20 MPa/cm) and repeating the steps S2-S5 to judge whether the risk zone is qualified again.
8. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to any one of claims 1 to 7, wherein: when the processing envelope surface meeting the requirement can not be obtained according to the step S3 in the risk zone identified according to the step S2, the following steps are added:
and step S7, re-determining the risk zone, repeating the steps S2-S5, and judging whether the risk zone is qualified again.
9. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to claim 8, wherein: and re-determining the risk zone by increasing the preset values of the high tensile stress zone, the high pressure stress zone and/or the high stress gradient zone, and repeating the steps S2-S5 to judge whether the risk zone is qualified again.
10. Method for the finishing of a metallic monolithic workpiece based on non-destructive stress measurements according to claim 7 or 9, characterized in that: and when the metal plate to be processed is still unqualified after the risk zone is determined again, judging that the metal plate to be processed cannot be processed into the product workpiece.
11. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to any one of claims 1 to 9, wherein: the nondestructive testing method of the residual stress can select a short-wavelength X-ray characteristic diffraction method, a high-energy synchrotron radiation hard X-ray diffraction method, a neutron diffraction method, a profile method, an ultrasonic method and the like.
12. The method for finishing a frame member of a polycrystalline material plate based on nondestructive measurement of internal residual stress according to any one of claims 1 to 9, wherein: the polycrystalline material plate to be processed is a metal plate, a metal-based composite material plate, a ceramic plate and the like.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247762A (en) * | 2021-12-30 | 2022-03-29 | 中国兵器工业第五九研究所 | Plate frame finishing method based on pre-stretched aluminum plate internal texture distribution uniformity |
| CN114739556A (en) * | 2022-06-13 | 2022-07-12 | 中铝材料应用研究院有限公司 | Secondary sectioning contour method residual stress test method |
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2021
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247762A (en) * | 2021-12-30 | 2022-03-29 | 中国兵器工业第五九研究所 | Plate frame finishing method based on pre-stretched aluminum plate internal texture distribution uniformity |
| CN114247762B (en) * | 2021-12-30 | 2023-06-20 | 中国兵器工业第五九研究所 | Plate frame piece finish machining method based on internal texture distribution uniformity of pre-stretching aluminum plate |
| CN114739556A (en) * | 2022-06-13 | 2022-07-12 | 中铝材料应用研究院有限公司 | Secondary sectioning contour method residual stress test method |
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