CN114367734B - Optimized process method for friction stir processing modification of surface layer of self-adaptive plate - Google Patents
Optimized process method for friction stir processing modification of surface layer of self-adaptive plate Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1275—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding involving metallurgical change
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Abstract
An optimization process method for friction stir processing modification of a self-adaptive plate surface layer is characterized in that a large number of experiments are carried out on the basis of experiments by selecting different materials, different steel shapes, different sizes and the like, different stirring head structures, process parameters, different modification paths, different modification modes and the like, various plate samples are obtained to carry out performance tests, related experiment results are obtained, a database is established, and data in the database of the results are expanded by combining finite element simulation and the experiments. And developing virtual software based on a result database, starting from the material, the shape and the size of the plate and customer requirements, respectively, finding out comparison from the database, displaying related test data, transmitting the test data to equipment for actual processing, realizing an intelligent and self-adaptive processing modification optimization method, and obtaining the required friction stir processing modified plate. The method not only saves cost, but also can accurately realize the surface layer modification of the steel, and is simple and convenient for practical popularization and application.
Description
Technical Field
The invention relates to a friction stir technology, in particular to a friction stir modification technology, and specifically relates to an optimization process method for self-adaptive friction stir processing modification of a plate surface.
Background
Equipment produced in ports, mining and other severe environments is scrapped too early due to the fact that the equipment is in corrosive, high-temperature, impact and other severe environments for a long time. The steel which is most widely used in the equipment is easy to corrode and wear under the severe environment, rust is quickly formed on the surface of the steel, the steel is corroded under the environment such as salt spray, the steel is thinner and thinner, the service life of the steel is shorter and shorter, and the failure rate of the equipment is frequent. Therefore, many similar enterprises select special steels imported from abroad to manufacture equipment, the cost is high, the imported steels cannot be independently produced in China in a short period, plates are scarce, the manufacturing cost is increased, the height is usually obtained in certain performance aspects, but the production cost is increased, the production enterprises are given up finally, the cost of the enterprises is greatly increased, the profit is reduced, the living space of the enterprises is small, and the phenomenon of closing of some serious small-sized mine enterprises occurs. Based on the occurrence of the problems, the invention determines and optimizes the steel friction stir modification processing method by a large number of experiments and concentrated force selection of different steels, different steel plate shapes and sizes, different stirring head structures, stirring head process parameters, stirring head processing paths, processing modification modes and the like, improves the effective process method for improving the performances such as the wear resistance, the corrosion resistance and the like of the steels on the basis of domestic steels, aims at reducing the manufacturing cost of enterprises and improving the profits of the enterprises, strengthens the process method for preparing the steel surface layer for realizing special purposes on the basis of common steels of the enterprises, provides certain technical support for the development of industrial technology and the like.
Disclosure of Invention
The invention aims to solve the problems that the existing friction stir modification lacks an optimal parameter selection method, so that the actual structure is greatly different from the theoretical expected structure in the modification process, and the modification effect is unreasonable. And developing virtual software based on a result database, starting from the material, the shape and the size of the plate and customer requirements, respectively, finding out comparison from the database, displaying related test data, transmitting the test data to equipment for actual processing, realizing an intelligent and self-adaptive processing modification optimization method, and obtaining the required friction stir processing modified plate.
The technical scheme of the invention is as follows:
an optimization process method for friction stir processing modification of a surface layer of a self-adaptive plate is characterized by comprising the following steps of:
firstly, a database of relevant parameters before friction stir processing modification experiments is established, and at least the following four databases are generally included:
(1) Building a structure library of shapes and sizes of various materials in different segmentation modes;
(2) Establishing a parameter library of different friction stir processing modification processes, which relates to the size of a shaft shoulder of a stirring head, the size of a stirring pin, an internal texture structure of the shaft shoulder of the stirring head, a thread structure on the stirring pin and the manufacturing material of the stirring head, a selection range of the rotation speed of the stirring head, a selection range of the advancing speed of the stirring head, a fixed range of the pressing down amount of the stirring head, a fixed range of the inclination angle of the stirring head, a positive rotation rule and a negative rotation rule of the stirring head and the like;
(3) Establishing a stirring head processing path mode library which comprises a linear type, a vertical type, an inside-out type, an outside-in type, a circular type from inside to outside, a circular type from outside to inside and the like;
(4) Establishing a processing modification mode library, wherein the library comprises the step of directly modifying through a stirring head without adding any modified powder; in addition, the modified powder is added, but the modified powder is added in different powder adding modes, such as drilling powder adding or direct grooving powder adding, wherein holes and grooves have related parameters which are specified by the modified powder, the modified powder is established in the library one by one, and the type of the added powder is determined while the modified powder is modified, so that modified layers with different properties, such as pure powder and mixed powder, are obtained, wherein the mixed powder is composed of mixed powder with various different properties, so that the mixed powder can be directly selected in the library, and the like.
Secondly, selecting different options from the 4 libraries to carry out a friction stir processing modification experiment to obtain different test plates, establishing libraries after obtaining different test results through related performance test experiments, wherein the test results related to residual stress and deformation need to be observed and analyzed through determined data, samples with particularly serious stress concentration and deformation are found out to be adjusted, different adjustment modes are selected from an adjustment mode library to carry out plate adjustment through adjustment, and detection is carried out again until obvious stress concentration and deformation do not occur, and the results are fed back to a modification result database for later use.
Thirdly, the results obtained through experiments are very limited, and the data of the modification result database must be expanded through a mode of combining simulation and experiments by establishing a model through finite elements. By establishing a model, simulating by adopting the same process parameters of the experiment, comparing the difference between the simulation result and the experiment result, if the difference is close to the difference, correctly establishing the model, simulating related data, and storing the data in a warehouse; if the simulation result is greatly different from the experiment result, the model is continuously corrected, the simulation is carried out again and compared with the experiment result until the simulation result is basically consistent with the experiment result, simulation related data enter a modification result database, and data in the database are increased.
And finally, based on a modification result database established by the results of the previous test, simulation and the like, self-matching selection is carried out by utilizing computer software, namely, a piece of virtual optimization friction stir processing modification software is developed, wherein the interface mainly relates to the material quality of the modified plate, the shape of the modified plate, the performance requirements of customers, background comparison, a plate segmentation module display, modification process parameter selection information display and the like, a stirring head processing path display, a processing modification mode display, a simulation result display, customer satisfaction and other information. In the software part, a processor directly inputs a processing modified material in the software, and inputs a client requirement into the software, a processing modified device determines the shape of a plate on a workbench through a camera and divides the plate, and finally a plate dividing module is displayed on a software interface, and a software background determines modification related process parameters such as a stirring head structure, a size, a forward speed, a rotating speed and the like according to the input modified material, the client requirement, the dividing module and the like and displays the parameters on the software interface; in addition, the information such as the processing path, the processing modification mode and the like of the stirring head is determined according to the modification result database information and displayed on a software interface, after the information is determined, the software automatically simulates, the simulation result is fed back to the interface, the satisfaction degree of a customer is determined through internal customer evaluation information, a processing worker can conveniently judge whether to select the optimized processing modification method for modification, if yes, the software reflects the data to friction stir processing modification equipment through a data line for actual friction stir processing modification of the workpiece, and a final modified surface layer is obtained.
The invention has the beneficial effects that:
the method adopted by the invention is that a plate friction stir processing modification result database is established in a mode of combining experiments and simulation, corresponding software is developed based on the database to carry out technical guidance on actual plate modification, an optimized processing technique method is obtained through software simulation, the actual processing technique method is realized in equipment, and the actual processed modified plate is obtained. The method not only saves cost, but also can accurately realize the modification of the surface layer of the steel, and is simple and convenient for practical popularization and application.
Drawings
FIG. 1 is a technical flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1.
An optimized process method for friction stir processing modification of a surface layer of a self-adaptive plate comprises the following steps:
firstly, at least one column of four related parameter databases before a friction stir processing modification experiment is established:
(1) Building a structure library of shapes and sizes of various materials in different segmentation modes;
(2) Establishing different technological parameter libraries for friction stir processing modification, which relate to the size of a shaft shoulder of a stirring head, the size of a stirring pin, the internal texture structure of the shaft shoulder of the stirring head, the thread structure on the stirring pin and the manufacturing material of the stirring head, the rotating speed selection range of the stirring head, the advancing speed selection range of the stirring head, the pressing pressure determination range of the stirring head, the inclination angle determination range of the stirring head, the forward and reverse rotation rules of the stirring head and the like;
(3) Establishing a stirring head processing path mode library which comprises a linear type, a vertical type, an inside-out type, an outside-in type, a circular type from inside to outside, a circular type from outside to inside and the like;
(4) Establishing a processing modification mode library, wherein the library comprises the step of directly modifying through a stirring head without adding any modified powder; in addition, the modified powder is added, but the modified powder is added in different powder adding modes, such as drilling powder adding or direct grooving powder adding, wherein holes and grooves have related parameters which are specified by the modified powder, the modified powder is established in the library one by one, and the type of the added powder is determined while the modified powder is modified, so that modified layers with different properties, such as pure powder and mixed powder, are obtained, wherein the mixed powder is composed of mixed powder with various different properties, so that the mixed powder can be directly selected in the library, and the like.
And secondly, selecting different options from the four libraries to carry out a friction stir processing modification experiment to obtain different test plates, establishing libraries by obtaining different test results through related performance test experiments, wherein the test results related to residual stress and deformation need to be observed and analyzed through determined data, finding out samples with particularly serious stress concentration and deformation to be adjusted, selecting different adjustment modes from an adjustment mode library to adjust the plates through adjustment, and feeding the results back to a modification result database for later use through detection until obvious stress concentration and deformation do not occur.
Thirdly, because the results obtained through experiments are very limited, the data of the modification result database can be expanded through a mode of combining simulation and experiments by establishing a model through finite elements. By establishing a model, simulating by adopting the same technological parameters of the experiment, comparing the difference between the simulation result and the experiment result, if the difference is close, correctly establishing the model, and simulating related data and storing the data in a storage; if the simulation result is greatly different from the experiment result, the model is continuously corrected, the simulation is carried out again and compared with the experiment result until the simulation result is basically consistent with the experiment result, simulation related data enter a modification result database, and data in the database are increased.
Finally, a modification result database is established based on the results of the previous tests, the simulation and the like, and corresponding software is developed by utilizing the database (software developers can realize the software by the prior art), namely, the software for virtually optimizing friction stir processing modification is developed, and the interface of the software mainly relates to the information of the modified plate material, the modified plate shape, the customer performance requirements, background comparison, a display plate segmentation module, display modification process parameter selection information and the like, display of a stirring head processing path, display of a processing modification mode, display of a simulation result, customer satisfaction and the like. In the software part, a processor directly inputs a processing modified material in the software, and inputs a client requirement into the software, a processing modified device determines the shape of a plate on a workbench through a camera and divides the plate, and finally a plate dividing module is displayed on a software interface, and a software background determines modification related process parameters such as a stirring head structure, a size, a forward speed, a rotating speed and the like according to the input modified material, the client requirement, the dividing module and the like and displays the parameters on the software interface; and in addition, information such as a stirring head processing path, a processing modification mode and the like is determined according to the modification result database information and is displayed on a software interface, after the information is determined, the software automatically simulates, the simulation result is fed back to the interface, the satisfaction degree of a customer is determined through internal customer evaluation information, a processing worker can conveniently judge whether to select the optimized processing modification method for modification, if yes, the software reflects the data to the friction stir processing modification equipment through a data line to perform actual friction stir processing modification on the workpiece, a final modified surface layer is obtained, and if not, the selection is performed again until a satisfactory result is obtained.
Aiming at the existing requirements of the sheet material on the surface layer, such as wear resistance, corrosion resistance and the like, the friction stir processing modification method can improve the requirements of the sheet material on the wear resistance, the corrosion resistance and the like, and can ensure that the modified sheet material does not generate large-area stress concentration and deformation as far as possible while considering the relevant requirements of the modified sheet material on the mechanical property and the like, thereby ensuring that the modified sheet material can be applied in a proper range. Based on the consideration of the aspect, detailed library establishment is carried out from aspects of modification process parameters, modification paths, processing modification modes and the like, the tightness and reliability of experimental results are ensured, relevant performance tests are carried out through modified plates, the test effect is ensured to reach the actual application effect, data in a modified result database are increased through finite element simulation, software is convenient to establish, theoretical guidance is provided for actual engineering application, engineering simulation is carried out through the established software, the simulation result is connected with actual equipment, the actual processing process method is determined, actual processing is carried out, and the required modified plates and the like are obtained. The method has good application effect and strong practicability, and can be popularized and applied.
The invention is not related in part to or can be practiced using the prior art.
Claims (2)
1. An optimization process method for friction stir processing modification of a surface layer of a self-adaptive plate is characterized by comprising the following steps of:
firstly, establishing a related parameter database before a friction stir processing modification experiment;
secondly, selecting different options from the related parameter database to carry out a friction stir processing modification experiment to obtain different experimental boards, obtaining different experimental results through a related performance test experiment to build a library, wherein the experimental results related to residual stress and deformation need to be observed and analyzed through determined data to find out samples with particularly serious stress concentration and deformation for adjustment, different adjustment modes are selected from an adjustment mode library for plate adjustment through adjustment, and the results are fed back to a modification result database for standby through detection again until obvious stress concentration and deformation do not occur;
thirdly, because the results obtained through experiments are very limited, a model must be established through finite elements, and the data of the modification result database are expanded through a mode of combining simulation and experiments; by establishing a model, simulating by adopting the process parameters same as the experiment, comparing the difference between the simulation result and the experiment result, if the model is close to the experiment result and the model is correctly established, simulating related data and storing the data in a storage; if the simulation result is greatly different from the experiment result, the model is continuously corrected, the simulation is carried out again and compared with the experiment result until the simulation result is basically consistent with the experiment result, simulation related data enter a modification result database, and the data volume in the database is increased;
finally, developing a virtual optimized software for friction stir processing modification based on a modification result database established by the previous experiment and simulation results, wherein the interface mainly relates to the material of the modified plate, the shape of the modified plate, the performance requirements of customers, background comparison, a display plate segmentation module, display modification process parameter selection information, display of a stir head processing path, display of a processing modification mode, display of a simulation result and customer satisfaction information; in the software part, a processor directly inputs a processing modified material in the software, and inputs a client requirement into the software, a processing modified device determines the shape of a plate on a workbench through a camera and divides the plate, and finally a plate dividing module is displayed on a software interface, and a software background determines modification-related process parameters including a stirring head structure, a size, a forward speed and a rotating speed according to the input modified material, the client requirement and the dividing module and displays the parameters on the software interface; in addition, the processing path and the processing modification mode information of the stirring head are determined according to the modification result database information and are displayed on a software interface, after the information is determined, the software automatically simulates, the simulation result is fed back to the interface, the customer satisfaction is determined through internal customer evaluation information, a processing worker can conveniently judge whether to select the process method for modification, and data is reflected to friction stir processing modification equipment through a data line for actual friction stir processing modification of a workpiece, so that a final modified surface layer is obtained; the related parameter database comprises:
(1) Building a shape and size structure library of various materials in different segmentation modes;
(2) Establishing different technological parameter libraries for friction stir processing modification, which relate to the size of a shaft shoulder of a stirring head, the size of a stirring pin, the internal texture structure of the shaft shoulder of the stirring head, the upper thread structure of the stirring pin and the manufacturing material of the stirring head, and setting the rotating speed selection range of the stirring head, the advancing speed selection range of the stirring head, the pressing pressure determining range of the stirring head, the inclination angle determining range of the stirring head and the forward and reverse rotation rules of the stirring head;
(3) Establishing a stirring head processing path mode library which comprises a linear type, an inside-out type and an outside-in type;
(4) Establishing a processing modification mode library, wherein the library comprises the step of directly modifying through a stirring head without adding any modified powder; the method also comprises adding modified powder, wherein the powder is added by drilling or directly grooving, no matter holes or grooves have specified related parameters, the powder is established in the library one by one, and the type of the added powder is determined while the powder is modified, so that modified layers with different properties are ensured.
2. The method of claim 1, wherein: the additive powder type includes pure powder or mixed powder, wherein the mixed powder is composed of powder containing a plurality of different properties so as to be directly selected in a library.
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