Single crystal superalloy dd9 blade tenon tooth grinding process design method and system

Abstract

The present application relates to the technical field of turbine blade tenon tooth forming grinding processing, and discloses a single crystal high-temperature alloy DD9 blade tenon tooth grinding process design method and system, mapping models of material removal rate, surface roughness after grinding and surface microhardness and grinding parameters are respectively established based on the measurement results of the blade tenon of the same material subjected to grinding processing under different grinding parameters; the corresponding weights of different mapping models are assigned, and the maximum and minimum values of each mapping model under the constraint condition of a given grinding parameter range value are comprehensively considered, so that multi-objective optimization is converted into a single-objective comprehensive target optimization function to perform grinding process parameter optimization. The present application can quickly optimize the grinding process parameters under the premise of ensuring the processing quality, ensure the efficient and high-quality grinding forming of the single crystal high-temperature alloy DD9 blade tenon, and obtain the tenon with higher grinding surface quality.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of turbine blade tenon tooth forming grinding processing, and discloses a single-crystal high-temperature alloy DD9 blade tenon tooth grinding process design method and system. BACKGROUND

[0002] The third-generation nickel-based single-crystal high-temperature alloy DD9 is widely used in the field of high-pressure turbine blade manufacturing of an aero-engine due to its excellent high-temperature comprehensive performance. The single-crystal high-temperature alloy turbine blade is mainly manufactured by using a precision investment casting process, and basically can realize precision casting forming of a blade profile without excess amount; however, the tenon tooth and the rim plate are installation and positioning structures of the turbine blade and the turbine disc, the structures are complex and the surface contour precision requirement is extremely high, and an excess amount needs to be reserved during casting and mechanical processing is performed to realize the precision requirement. The slow-approach forming grinding is used for precision mechanical processing of aerospace high-temperature alloy materials due to the high surface quality and processing precision obtained by the slow-approach forming grinding as a kind of efficient precision processing mode. However, the nickel-based high-temperature alloy is a typical high-strength and high-toughness difficult-to-machine material, and problems such as high grinding temperature and large grinding wheel wear are prone to occur during processing, which leads to poor grinding surface quality and even burning, and seriously affects the mechanical properties and fatigue strength of the workpiece.

[0003] The existing tenon tooth forming grinding process continues the process scheme of the second-generation single-crystal high-temperature alloy DD5 and DD6, and defects such as cracks, scratches and burns are prone to occur on the grinding surface, the surface quality and contour precision are poor (the surface roughness Ra is greater than 0.8 microns, and the surface contour precision Uz is greater than 0.015 mm), thereby leading to blade scrapping. Meanwhile, the tenon tooth forming grinding process scheme is conservative, and has the problem of low efficiency. SUMMARY

[0004] The single-crystal high-temperature alloy DD9 blade tenon tooth grinding process design method and system can quickly optimize the grinding process parameters on the premise of ensuring the processing quality, and ensure efficient and high-quality grinding forming of the single-crystal high-temperature alloy DD9 blade tenon tooth.

[0005] In order to realize the above technical effects, the technical scheme adopted by the application is as follows:

[0006] The single-crystal high-temperature alloy DD9 blade tenon tooth grinding process design method comprises the following steps:

[0007] The blade tenon tooth of the same material is ground by using different grinding parameters, and the surface roughness and surface microhardness of the blade tenon tooth material after grinding under each grinding parameter condition are obtained;

[0008] constructing a first objective function between the surface roughness and the grinding parameters and a second objective function between the surface microhardness and the grinding parameters according to the surface roughness and the surface microhardness of the blade tenon tooth material surface after grinding under each grinding parameter condition; and constructing a third objective function between the material removal rate and the grinding parameters according to the grinding parameters;

[0009] obtaining a first maximum value and a first minimum value of the surface roughness by using the first objective function analysis, obtaining a second maximum value and a second minimum value of the surface microhardness by using the second objective function analysis, and obtaining a third maximum value and a third minimum value of the material removal rate by using the third objective function analysis;

[0010] constructing a comprehensive objective optimization function of the blade tenon tooth grinding processing based on the weight coefficients of the first objective function, the second objective function and the third objective function and the first maximum value and the first minimum value of the surface roughness, the second maximum value and the second minimum value of the surface microhardness, and the third maximum value and the third minimum value of the material removal rate;

[0011] taking the grinding parameters corresponding to the minimum value of the comprehensive objective optimization function as the processing parameters of the blade tenon tooth grinding processing according to the given grinding parameter range values as the constraint conditions.

[0012] Further, the comprehensive objective optimization function of the blade tenon tooth grinding processing constructed is wherein is the function value of the comprehensive objective optimization function, is the weight of the first objective function, is the weight of the second objective function, is the weight of the third objective function, and , is the first objective function between the surface roughness and the grinding parameters, is the second objective function between the surface microhardness and the grinding parameters, is the third objective function between the material removal rate and the grinding parameters, represents the minimum value of the corresponding first objective function in the given grinding parameter range values, represents the maximum value of the corresponding first objective function in the given grinding parameter range values, is one, two or three.

[0013] Further, the blade tenon tooth is ground by using the grinding wheel grinding method, wherein the grinding parameters include the grinding wheel linear speed, the workpiece feeding speed and the grinding depth.

[0014] Further, the first objective function between the surface roughness and the grinding parameter , the second objective function of the surface microhardness and the grinding parameter , the third objective function between the material removal rate and the grinding parameter Wherein is the grinding wheel linear speed, is the workpiece feed speed, is the grinding depth.

[0015] To achieve the above technical effects, the application further provides a single crystal high-temperature alloy DD9 blade tenon tooth grinding process design system, comprising:

[0016] A data acquisition module is configured to acquire blade tenon material surface roughness and surface microhardness data under different grinding parameter conditions, wherein the surface roughness and surface microhardness are obtained by grinding the blade tenon of the same material according to the corresponding grinding parameters.

[0017] An objective function construction module is configured to construct a first objective function between the surface roughness and the grinding parameter, and a second objective function of the surface microhardness and the grinding parameter, respectively, according to the blade tenon material surface roughness and surface microhardness after grinding under each grinding parameter condition; and construct a third objective function between the material removal rate and the grinding parameter according to the grinding parameter.

[0018] A model analysis module is configured to analyze the first objective function to obtain a first maximum value and a first minimum value of the surface roughness, analyze the second objective function to obtain a second maximum value and a second minimum value of the surface microhardness, and analyze the third objective function to obtain a third maximum value and a third minimum value of the material removal rate, with a given grinding parameter range value.

[0019] An optimization function construction module is configured to construct a comprehensive objective optimization function of the blade tenon grinding process based on the weight coefficients assigned by the first objective function, the second objective function, and the third objective function, and the first maximum value and the first minimum value of the surface roughness, the second maximum value and the second minimum value of the surface microhardness, and the third maximum value and the third minimum value of the material removal rate.

[0020] A grinding parameter determination module is configured to take the grinding parameter corresponding to the minimum value of the comprehensive objective optimization function as the processing parameter of the blade tenon grinding process, with a given grinding parameter range value as a constraint condition.

[0021] Further, in the optimization function construction module, the comprehensive objective optimization function of the blade tenon grinding process constructed is Wherein a function value of a comprehensive target optimization function, a weight of the first target function assigned, a weight of the second target function assigned, a weight of the third target function assigned, and , a first target function between surface roughness and grinding parameters, a second target function between surface microhardness and grinding parameters, a third target function between material removal rate and the grinding parameters, denotes the minimum value of the corresponding first target function within a given range of values of the grinding parameters, denotes the maximum value of the corresponding first target function within a given range of values of the grinding parameters, is one, two or three.

[0022] Further, in the data acquisition module, the blade tenon is ground by a grinding wheel grinding mode, wherein the grinding parameters include a grinding wheel linear speed, a workpiece feed speed and a grinding depth.

[0023] Further, in the target function construction module, the first target function between surface roughness and grinding parameters is , the second target function between surface microhardness and grinding parameters is , and the third target function between material removal rate and the grinding parameters is , wherein is the grinding wheel linear speed, is the workpiece feed speed, is the grinding depth.

[0024] Compared with the prior art, the present application has the beneficial effects that the present application converts multi-target optimization into a single-target comprehensive target optimization function to optimize grinding process parameters, can quickly optimize grinding process parameters under the premise of ensuring processing quality, ensures efficient and high-quality grinding forming of single crystal high-temperature alloy DD9 blade tenon, and obtains a blade tenon with higher grinding surface quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a flow chart of a single crystal high-temperature alloy DD9 blade tenon grinding process design method in Example 1 or 2;

[0026] Figure 2 is a structural block diagram of a single crystal high-temperature alloy DD9 blade tenon grinding process design system in Example 1 or 2;

[0027] Figure 3Figure 1 is a schematic diagram of a single crystal superalloy DD9 blade tenon grinding device for example 1 or 2;

[0028] Figure 4 Figure 2 is a subsurface microstructure map of the single crystal superalloy DD9 blade tenon after grinding for example 2;

[0029] Wherein, 1, blade tenon; 2, grinding wheel; 3, data acquisition module; 4, objective function construction module; 5, model analysis module; 6, optimization function construction module; 7, grinding parameter determination module. DETAILED DESCRIPTION

[0030] The application will be further described in conjunction with the examples and drawings. However, this should not be understood as limiting the scope of the above-mentioned subject matter of the application to the following examples, and any technology implemented based on the content of the application falls within the scope of the application.

[0031] Example 1

[0032] Referring to Figures 1-3 , a single crystal superalloy DD9 blade tenon grinding process design method, comprising:

[0033] Grinding the blade tenon 1 of the same material with different grinding parameters to obtain the surface roughness and surface microhardness of the blade tenon 1 material after grinding under each grinding parameter condition;

[0034] According to the surface roughness and surface microhardness of the blade tenon 1 material after grinding under each grinding parameter condition, a first objective function between the surface roughness and the grinding parameter, and a second objective function between the surface microhardness and the grinding parameter are constructed respectively; and according to the grinding parameter, a third objective function between the material removal rate and the grinding parameter is constructed;

[0035] With a given grinding parameter range value, the first objective function is used to analyze to obtain the first maximum and first minimum of the surface roughness; the second objective function is used to analyze to obtain the second maximum and second minimum of the surface microhardness, and the third objective function is used to analyze to obtain the third maximum and third minimum of the material removal rate;

[0036] Based on the weight coefficients assigned by the first objective function, the second objective function, and the third objective function, and the first maximum and first minimum of the surface roughness, the second maximum and second minimum of the surface microhardness, and the third maximum and third minimum of the material removal rate, a comprehensive objective optimization function for the blade tenon 1 grinding process is constructed;

[0037] According to a given grinding parameter range value as a constraint condition, the grinding parameter corresponding to the minimum value of the comprehensive target optimization function is taken as the machining parameter of the blade tenon 1 grinding machining.

[0038] In the embodiment, based on the measurement results of the blade tenon 1 of the same material subjected to grinding machining under different grinding parameters, the material surface roughness and surface microhardness data of the blade tenon 1 under the corresponding grinding parameter condition are obtained, and the mapping models (i.e., the first target function, the second target function, and the third target function) of the material removal rate, the surface roughness after grinding, and the surface microhardness related to the grinding parameters are respectively established; by assigning corresponding weights to different mapping models and comprehensively considering the maximum value and the minimum value of each mapping model under the given grinding parameter range value as a constraint condition, the multi-objective optimization is converted into a single-objective comprehensive target optimization function to perform grinding process parameter optimization, so that the grinding process parameters can be quickly optimized under the premise of ensuring the machining quality, and efficient and high-quality grinding forming of the single crystal high-temperature alloy DD9 blade tenon 1 is ensured.

[0039] Based on the same inventive concept, the embodiment also provides a single crystal high-temperature alloy DD9 blade tenon grinding process design system, which comprises:

[0040] A data acquisition module 3 is configured to acquire material surface roughness and surface microhardness data of the blade tenon 1 under different grinding parameter conditions, wherein the surface roughness and the surface microhardness are obtained according to grinding machining tests of the blade tenon 1 of the same material under corresponding grinding parameters;

[0041] A target function construction module 4 is configured to construct a first target function between the surface roughness and the grinding parameter and a second target function between the surface microhardness and the grinding parameter according to the material surface roughness and the surface microhardness of the blade tenon 1 after grinding under each grinding parameter condition, respectively; and to construct a third target function between the material removal rate and the grinding parameter according to the grinding parameter;

[0042] A model analysis module 5 is configured to obtain a first maximum value and a first minimum value of the surface roughness by using the first target function to analyze the surface roughness under a given grinding parameter range value; to obtain a second maximum value and a second minimum value of the surface microhardness by using the second target function to analyze the surface microhardness; and to obtain a third maximum value and a third minimum value of the material removal rate by using the third target function to analyze the material removal rate;

[0043] An optimization function construction module 6 is configured to construct a comprehensive target optimization function of the blade tenon 1 grinding process based on the first target function, the second target function, the third target function, and the first maximum value and the first minimum value of the surface roughness, the second maximum value and the second minimum value of the surface microhardness, and the third maximum value and the third minimum value of the material removal rate.

[0044] A grinding parameter determination module 7 is configured to take the grinding parameter corresponding to the minimum value of the comprehensive target optimization function as the processing parameter of the blade tenon 1 grinding process according to the given grinding parameter range value as a constraint condition.

[0045] Embodiment 2

[0046] Referring to Figures 1-4 , this embodiment takes the grinding process design of a certain type of single-crystal high-temperature alloy DD9 blade tenon 1 as an example to specifically describe the single-crystal high-temperature alloy DD9 blade tenon grinding process design method and process of the present application.

[0047] The DD9 blade blank in this embodiment is a precision casting, and the blade (except for the tenon, the four sides of the rim plate, and the blade crown which need to be machined) is a single-crystal precision casting with no excess amount, and the surface roughness Ra is not greater than 2.4 μm. The specific design steps are as follows:

[0048] Step one, the same material blade tenon 1 is ground by using different grinding parameters, and the surface roughness and surface microhardness of the blade tenon 1 material after grinding under each grinding parameter condition are obtained.

[0049] In this embodiment, the blade tenon 1 is ground by using a grinding wheel 2, the grinding equipment is a three-axis and five-axis numerical control grinding machining center, the grinding wheel 2 is selected as a WA / PA 80 / 100# F25VCF2-P 300×32×72.6mm grinding wheel 2, the grinding hydraulic pressure is 1.2 MPa, and the flow rate is 300 L / min; wherein the grinding parameters include the grinding wheel linear speed, the workpiece feeding speed, and the grinding depth. In this embodiment, the grinding test is carried out by using an orthogonal test, and according to the grinding experience, if the workpiece (DD9 blade test piece) feeding speed is large, the grinding depth is large, and the grinding wheel linear speed is small, the grinding surface quality is poor; therefore, the grinding wheel linear speed is controlled between 15 m / s and 30 m / s, the workpiece feeding speed is controlled between 120 mm / min and 210 mm / min, and the grinding depth is controlled between 0.1 mm and 0.7 mm. The grinding parameters are shown in Table 1 as follows:

[0050] Table 1 Grinding parameter table of DD9 blade grinding process

[0051] ​​

[0052] The embodiment first needs to verify the grinding wheel 2 before grinding: using a roller to shape the grinding wheel 2, then grinding the test block to detect whether the roller tooth shape and size meet the drawing requirements. The roller is a diamond roller, the grinding wheel 2 trimming rate is 0.0004mm / turn, the grinding wheel 2 and the trimming wheel speed ratio is -0.7, and the online continuous trimming is installed on the trimming machine spindle. Its shape is consistent with the surface shape of the related part of the processed blade, the surface diamond particles should be uniformly distributed, no degranulation, no protrusion, and be fixed on the base by electroplating or brazing.

[0053] Before grinding, the DD9 blade is clamped on the slow feed forming grinding machine using a special clamp, and is completely positioned according to the six-point positioning principle. After clamping, the clamp positioning point and the blade are checked with a feeler gauge to ensure that the positioning points are in close contact with the blade, and the error is not more than 0.02mm.

[0054] In the embodiment, a Mitutoyo roughness meter is used for detection, the sampling length is 5.6mm, the evaluation length is 0.8mm, and the surface roughness is measured at 5 positions perpendicular to the grinding direction and along the grinding direction on the grinding surface of the workpiece respectively, and the average value is obtained. The surface hardness is measured by a 430SVD digital display Vickers hardness tester, and the microhardness of 5 regions on the grinding surface of the part is collected and averaged.

[0055] Step two, according to the surface roughness and surface microhardness of the blade tenon tooth 1 material surface after grinding under each grinding parameter condition, a first objective function between the surface roughness and the grinding parameter is constructed, and a second objective function between the surface microhardness and the grinding parameter is constructed; and according to the grinding parameter, a third objective function between the material removal rate and the grinding parameter is constructed;

[0056] In the embodiment, based on the measurement results of the orthogonal test, the regression analysis method is used to establish the mapping model between the grinding parameters and the surface roughness Ra and the grinding surface microhardness HV, wherein:

[0057] The first objective function between the surface roughness and the grinding parameter ;

[0058] The second objective function between the surface microhardness and the grinding parameter ;

[0059] In addition, according to the grinding parameter, a third objective function between the material removal rate and the grinding parameter is constructed ;

[0060] Wherein is the linear speed of the grinding wheel, is the workpiece feed speed, is the grinding depth.

[0061] By step two, single-objective functions respectively satisfying the surface roughness target, the surface microhardness target, and the material removal rate target can be obtained.

[0062] Step three, using the first target function analysis, the first maximum and minimum values of the surface roughness are obtained; using the second target function analysis, the second maximum and minimum values of the surface microhardness are obtained; using the third target function analysis, the third maximum and minimum values of the material removal rate are obtained;

[0063] The given grinding parameter range value is the grinding wheel linear speed is controlled between 15 m / s and 30 m / s, the workpiece feed speed is controlled between 120 mm / min and 210 mm / min, and the grinding depth is controlled between 0.1 mm and 0.7 mm. The maximum and minimum values of the corresponding target function within the given grinding parameter range value can be obtained according to the first target function, the second target function, and the third target function respectively.

[0064] Step four, based on the weight coefficients assigned by the first target function, the second target function, and the third target function, as well as the first maximum and minimum values of the surface roughness, the second maximum and minimum values of the surface microhardness, and the third maximum and minimum values of the material removal rate, a comprehensive target optimization function for the blade tenon tooth 1 grinding process is constructed.

[0065] In this embodiment, the grinding wheel linear speed , the workpiece feed speed , and the grinding depth are taken as optimization process variables. The comprehensive weight method assigns certain weight coefficients to each mapping model, converts the multi-objective optimization function into a single-objective comprehensive target optimization function for process parameter optimization. The comprehensive target optimization function for the blade tenon tooth 1 grinding process constructed in this way is , wherein is the function value of the comprehensive target optimization function, is the weight of the assigned first target function, is the weight of the assigned second target function, is the weight of the assigned third target function, and , is the first target function between the surface roughness and the grinding parameters, is the second target function between the surface microhardness and the grinding parameters, a third objective function between the material removal rate and the grinding parameters, a corresponding first a minimum value of the objective function within a given range of values of the grinding parameters, a corresponding first a maximum value of the objective function within a given range of values of the grinding parameters, is one, two or three.

[0066] In this embodiment, the distribution of weights is as follows:

[0067] When performing the slow feed grinding rough machining of the DD9 blade, the focus is to meet the project precision, and under the premise of requiring a smaller surface roughness, to have a larger material removal rate as much as possible to improve the processing efficiency. Therefore, a larger weight should be given to the material removal rate to ensure high grinding efficiency; the other two objectives are given a smaller subjective weight, and the weight taken in rough machining is , ,

[0068] When performing the slow feed grinding high-precision finishing of the DD9 blade, the focus is to obtain a better grinding surface quality, so a larger weight should be given to the surface roughness, and the other two objectives are given a smaller subjective weight. Through consulting literature and combining with the experience of some producers, the weight taken in finishing is , ,

[0069] Step five, according to the given grinding parameter range value as a constraint condition, taking the grinding parameter corresponding to the minimum value of the comprehensive objective optimization function as the machining parameter of the blade tenon tooth 1 grinding machining;

[0070] In this embodiment, according to the weight and related objective function distributed according to different machining processes, the grinding parameters corresponding to the machining processes are shown in Table 2.

[0071] Table 2 Grinding parameter table of DD9 blade obtained by optimization in rough machining and finishing

[0072]

[0073] In this embodiment, the optimized grinding parameters can realize that the surface roughness Ra reaches 0.529 μm, the surface hardening degree is 9.9%, the hardening layer depth is 40 μm, and the plastic deformation layer depth is about 1.1 μm (as shown in Figure 4 ​​), the face profile precision Uz is less than 0.01mm, the tooth profile displacement is less than 0.01mm, and the grinding surface is free of burn, scratch and pit; in addition, compared with the traditional grinding process for grinding the same type of DD9 blade tenon 1, the single piece takes 18 minutes, and the optimized grinding parameter is used for single crystal superalloy DD9 blade tenon 1 slow forming, and the single piece blade grinding processing time is 12 minutes, and the time is shortened by 50%.

[0074] In summary, the third generation of the nickel-based single crystal superalloy DD9 blade tenon 1 slow forming high-efficiency high-quality grinding process design method provided by the present application realizes the slow forming grinding efficient precision machining of the tenon. By optimizing the process parameters, the smallest surface roughness is obtained, the surface is free of defects, and the subsurface damage is small, which can improve the machining efficiency and obtain higher grinding surface quality of the tenon.

[0075] It should be noted that the single crystal superalloy DD9 blade tenon grinding process design method of the present application is not only suitable for the rough machining and finish machining of the DD9 blade tenon 1, but also suitable for the semi-finish machining of the DD9 blade tenon 1, and the weight distribution of the corresponding objective function needs to be given when semi-finish machining is required.

[0076] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for designing the grinding process of tenon teeth on DD9 blades made of single-crystal high-temperature alloy, characterized in that, include: Different grinding parameters were used to grind blade tenons of the same material to obtain the surface roughness and surface microhardness of the blade tenon material after grinding under each grinding parameter condition. Based on the surface roughness and microhardness of the blade tenon material after grinding under each grinding parameter condition, a first objective function between the surface roughness and the grinding parameters and a second objective function between the surface microhardness and the grinding parameters are constructed respectively; and based on the grinding parameters, a third objective function between the material removal rate and the grinding parameters is constructed. Given a range of grinding parameters, the first maximum and first minimum values ​​of the surface roughness are obtained by analyzing using the first objective function. The second maximum and the second minimum values ​​of the surface microhardness are obtained by using the second objective function analysis, and the third maximum and the third minimum values ​​of the material removal rate are obtained by using the third objective function analysis. Based on the weight coefficients assigned to the first objective function, the second objective function, and the third objective function, as well as the first maximum and first minimum values ​​of the surface roughness, the second maximum and second minimum values ​​of the surface microhardness, and the third maximum and third minimum values ​​of the material removal rate, a comprehensive objective optimization function for the grinding of the blade tenon teeth is constructed. Based on the given range of grinding parameters as constraints, the grinding parameters corresponding to the minimum value of the comprehensive objective optimization function are used as the processing parameters for grinding the blade tenon teeth.

2. The method for designing the grinding process of tenon teeth for single-crystal high-temperature alloy DD9 blades according to claim 1, characterized in that, The comprehensive objective optimization function for the grinding of the blade tenon teeth is as follows: ,in To optimize the function value of the overall objective function, The weights for the first objective function are assigned. The weights for the assigned second objective function, The weights of the assigned third objective function, and , Let surface roughness be the first objective function relating grinding parameters. This is the second objective function relating surface microhardness and grinding parameters. The third objective function relating material removal rate and the grinding parameters is... Indicates the corresponding number The objective function is the minimum value within a given range of grinding parameters. Indicates the corresponding number The maximum value of the objective function within a given range of grinding parameters. It can be one, two, or three.

3. The method for designing the grinding process of tenon teeth for single-crystal high-temperature alloy DD9 blades according to claim 2, characterized in that, The blade tenon teeth are ground using a grinding wheel grinding method, wherein the grinding parameters include the grinding wheel linear speed, the workpiece feed speed, and the grinding depth.

4. The method for designing the grinding process of tenon teeth for single-crystal high-temperature alloy DD9 blades according to claim 3, characterized in that, The first objective function between surface roughness and grinding parameters The second objective function of the surface microhardness and grinding parameters The third objective function relating material removal rate to the grinding parameters ,in The linear velocity of the grinding wheel. For workpiece feed rate, This refers to the grinding depth.

5. A grinding process design system for the tenon teeth of DD9 single-crystal high-temperature alloy blades, characterized in that, include: The data acquisition module is used to collect surface roughness and surface microhardness data of blade tenon material under different grinding parameter conditions. The surface roughness and surface microhardness are obtained by grinding processing tests on blade tenons of the same material according to the corresponding grinding parameters. The objective function construction module is used to construct a first objective function between the surface roughness and the grinding parameters, and a second objective function between the surface microhardness and the grinding parameters, based on the surface roughness and surface microhardness of the blade tenon material after grinding under each grinding parameter condition; and to construct a third objective function between the material removal rate and the grinding parameters based on the grinding parameters. The model analysis module is used to analyze and obtain the first maximum and first minimum values ​​of the surface roughness using the first objective function with a given range of grinding parameters. The second maximum and the second minimum values ​​of the surface microhardness are obtained by using the second objective function analysis, and the third maximum and the third minimum values ​​of the material removal rate are obtained by using the third objective function analysis. The optimization function construction module is used to construct a comprehensive objective optimization function for the blade tenon grinding process based on the weight coefficients assigned to the first objective function, the second objective function, and the third objective function, as well as the first maximum and the first minimum values ​​of the surface roughness, the second maximum and the second minimum values ​​of the surface microhardness, and the third maximum and the third minimum values ​​of the material removal rate. The grinding parameter determination module is used to determine the grinding parameters corresponding to the minimum value of the comprehensive objective optimization function as the processing parameters for grinding the blade tenon teeth, based on the given range of grinding parameters as constraints.

6. The single-crystal high-temperature alloy DD9 blade tenon grinding process design system according to claim 5, characterized in that, In the optimization function construction module, the comprehensive objective optimization function constructed for the blade tenon grinding process is as follows: ,in To optimize the function value of the overall objective function, The weights for the first objective function are assigned. The weights for the assigned second objective function, The weights of the assigned third objective function, and , Let surface roughness be the first objective function relating grinding parameters. This is the second objective function relating surface microhardness and grinding parameters. The third objective function relating material removal rate and the grinding parameters is... Indicates the corresponding number The objective function is the minimum value within a given range of grinding parameters. Indicates the corresponding number The maximum value of the objective function within a given range of grinding parameters. It can be one, two, or three.

7. The single-crystal high-temperature alloy DD9 blade tenon grinding process design system according to claim 6, characterized in that, In the data acquisition module, the blade tenon teeth are ground using a grinding wheel grinding method, wherein the grinding parameters include the grinding wheel linear speed, the workpiece feed speed, and the grinding depth.

8. The single-crystal high-temperature alloy DD9 blade tenon grinding process design system according to claim 7, characterized in that, In the objective function construction module, the first objective function relating surface roughness and grinding parameters is... The second objective function of the surface microhardness and grinding parameters The third objective function relating material removal rate to the grinding parameters ,in The linear velocity of the grinding wheel. For workpiece feed rate, This refers to the grinding depth.

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