Method for structuring complex machining matching relation of spaceflight servo valve

Abstract

The invention discloses a method for structuring a complex machining matching relation of an aerospace servo valve. The method comprises the following steps of: determining a part size matching characteristic and a part matching type; determining a parent item part and a child item part; determining matching logic between the parent part and the subitem part, obtaining a matching logic mathematical model according to the matching logic, and obtaining a size matching characteristic value of the subitem part according to the matching logic mathematical model; creating matched basic data in the CAPP system; creating a structural process of a parent part and a structural process of a subitem part in a CAPP system; obtaining a matching relationship between the parent part and the subitem part, parent part attributes, subitem part attributes and matching attributes of the parent part and the subitem part; and obtaining associated data of the parent item part and the child item part. According to the method, the working efficiency, the normalization and the accuracy are improved, and the structuralization requirement of quality data is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of servo valve parts machining and matching, and particularly relates to a method for realizing structuralization of complex machining and matching relationship of a space servo valve. BACKGROUND

[0002] The servo valve is a core element of a servo mechanism, and has the characteristics of high precision requirement, complex matching relationship, multiple quality critical characteristics, great production management difficulty, and long inherent manufacturing cycle. Taking a nozzle baffle valve as an example, four nozzle outer circles need to be matched with four holes of a base respectively with interference, and paired nozzles have flow pairing requirements; a feedback rod ball of an armature assembly has matching requirements with a feedback groove of a valve core, the valve core has gap and lap amount matching requirements with a valve sleeve; a feedback piston in a dynamic pressure feedback assembly has three gap matching requirements with two sleeves and a servo valve shell respectively. The current production level needs to plan the machining sequence of each part according to the matching relationship between the parts. In the machining production process, the method of recording the original quality data of the matching parts by using a paper matching table is still adopted, and the following problems mainly exist: 1) the key process data is not structured, and data analysis and query need to be checked by technical personnel, and the work of technical analysis, review and recheck is repeated and the workload of data transcription is large; 2) when the matching size is machined, the operator needs to manually calculate the size range of the matching machining according to the machined size of the matching part, which is low in efficiency and easy to make mistakes; 3) the manual filling is poor in standardization, and it is difficult to ensure the accuracy of the information and to avoid quality errors caused by human identification in the production site. SUMMARY

[0003] The application solves the technical problem of overcoming the deficiencies of the prior art, providing a method for realizing structuralization of complex machining and matching relationship of a space servo valve, automatically generating the machining size of the corresponding part, changing the original manual calculation method of the operator, improving the work efficiency, standardization and accuracy, and realizing the requirement of structuralization of the quality data.

[0004] The application is achieved by the following technical scheme: a method for realizing complex machining and matching relationship structuring of an aerospace servo valve, comprising: determining the characteristics of part size matching and part matching types; determining parent parts and child parts according to the characteristics of part size matching and part matching types; determining the matching logic between the parent parts and the child parts, obtaining a matching logic mathematical model according to the matching logic, and obtaining the characteristic value of the size matching of the child parts according to the matching logic mathematical model; creating matching basic data in a CAPP system according to the matching logic between the parent parts and the child parts; creating the structured process of the parent parts and the structured process of the child parts in the CAPP system; obtaining the matching relationship of the parent parts and the child parts, the attribute of the parent parts, the attribute of the child parts, and the matching attribute of the parent parts and the child parts according to the matching basic data and the structured process of the parent parts and the child parts; and associating the size requirements of the characteristics of the size matching of the child parts with the matching relationship of the parent parts and the child parts and the size requirements of the characteristics of the size matching of the parent parts, respectively, to obtain the associated data of the parent parts and the child parts.

[0005] In the above method for realizing complex machining and matching relationship structuring of an aerospace servo valve, the characteristics of part size matching include an inner hole, an outer circle, and a length; and the part matching types include a gap, an interference, and a protrusion amount.

[0006] In the above method for realizing complex machining and matching relationship structuring of an aerospace servo valve, when the part matching type is the gap and the interference, the parent part is a part with a machined inner hole characteristic, and the child part is a part with a machined outer circle characteristic; and when the part matching type is the protrusion amount, the parent part is a shell type part, and the child part is a valve sleeve type part.

[0007] In the above method for realizing complex machining and matching relationship structuring of an aerospace servo valve, the matching logic between the parent parts and the child parts includes one-to-one and one-to-many; wherein one-to-one means that one child part matches with one parent part, and one-to-many means that one child part matches with two parent parts.

[0008] In the above method for realizing complex machining and matching relationship structuring of an aerospace servo valve, when the child part and the parent part are interference matched, the mathematical model is b-A=+(x1-x2); when the child part and the parent part are interference matched, the mathematical model is b-A=-(x1-x2); and when the child part and the two parent parts are protrusion matched, the mathematical model is b+B-A=+(x1-x2); wherein b is the characteristic value of the size matching of the child part, A is the characteristic value of the size matching of the parent part, B is the characteristic value of the size matching of the second parent part, x1-x2 is the matching requirement value range, x1 is the minimum value of the matching requirement value, and x2 is the maximum value of the matching requirement value.

[0009] The supporting relationship of the aerospace servo valve complex machining is structured, and the supporting basic data includes product grouping, parent part and child part, parent part size matching feature and child part size matching feature, parent part material code and child part material code, and parent part feature requirement value and child part feature requirement value.

[0010] In the method for structuring the supporting relationship of the aerospace servo valve complex machining, the basic data of the parent part and the child part created in the CAPP system includes: creating product grouping in the classification management module of the CAPP system; the product name includes a servo valve or other products; creating part classification under the product grouping hierarchical node; the part classification includes the parent part and the child part; creating part feature attributes under the part classification hierarchical node; binding the material code of the part corresponding to the product; and maintaining the requirement value of the part matching feature.

[0011] In the method for structuring the supporting relationship of the aerospace servo valve complex machining, the parent part attribute includes: parent code, parent name, parent multiplication, parent attribute quantity, parent position, parent attribute, parent supporting process, and parent interrelation.

[0012] In the method for structuring the supporting relationship of the aerospace servo valve complex machining, the child part attribute includes: child code, child name, child multiplication, child attribute quantity, child position, and child attribute.

[0013] In the method for structuring the supporting relationship of the aerospace servo valve complex machining, the supporting attribute of the parent part and the child part includes a corresponding supporting table, parent size requirement, child size requirement, supporting technical requirement, min interference amount, and max interference amount.

[0014] The system for realizing the structuralization of the complex machining matching relationship of aerospace servo valve comprises: a first module for determining the size matching features of parts and the matching types of parts; a second module for determining the parent part and the child part according to the size matching features of parts and the matching types of parts; a third module for determining the matching logic between the parent part and the child part, obtaining the matching logic mathematical model according to the matching logic, and obtaining the feature value of the size matching of the child part according to the matching logic mathematical model; a fourth module for creating the matching basic data in the CAPP system according to the matching logic between the parent part and the child part; a fifth module for creating the structured process of the parent part and the structured process of the child part in the CAPP system; a sixth module for obtaining the matching relationship of the parent part and the child part, the attribute of the parent part, the attribute of the child part and the matching attribute of the parent part and the child part according to the matching basic data and the structured process of the parent part and the structured process of the child part; and a seventh module for associating the size requirements of the size matching features of the child part with the matching relationship of the parent part and the child part and the size requirements of the size matching features of the parent part respectively, and obtaining the associated data of the parent part and the child part.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) The present application adopts the parent-child relationship logic, sets different scenes and correspondingly establishes mathematical models, calculates the index range to be reached according to the parent part value when the child part is machined, and realizes the automatic calculation of matching data;

[0017] (2) The present application realizes the structured maintenance of the coupling part matching data information by using the CAPP system, realizes the paperless transmission of quality data, and avoids the quality errors caused by human identification in the production site;

[0018] (3) The present application realizes the interaction of the coupling part matching data by using the structured means, establishes the dynamic association of the matching size and the matching process, realizes the closed loop of the matching data link when repairing, and improves the working efficiency of the coupling part matching machining in the production process;

[0019] (4) The present application enables the matching original data to be stored in the system in a structured manner, realizes the servo valve matching original data summary and analysis function, and facilitates the analysis, review and recheck of the data use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further assist in understanding the preferred embodiments, and are not intended to limit the present application. Moreover, the same reference numerals are used throughout the various drawings to designate the same or similar parts. In the drawings:

[0021] Figure 1 is a flow chart of the method for realizing the complex machining matching relationship structuring of the aerospace servo valve provided by the embodiment of the present application;

[0022] Figure 2 is a flow chart of the method for realizing the complex machining matching relationship structuring of the aerospace servo valve provided by the embodiment of the present application;

[0023] Figure 3 is a flow chart of the method for realizing the complex machining matching relationship structuring of the aerospace servo valve provided by the embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the cooperation between the shell and the pin provided by the embodiment of the present application;

[0025] Fig. 5(a) is a schematic diagram of the cooperation position between the shell and the pin provided by the embodiment of the present application;

[0026] Fig. 5(b) is another schematic diagram of the cooperation position between the shell and the pin provided by the embodiment of the present application;

[0027] Figure 6 is a schematic diagram of the cooperation between the shell, the large valve sleeve and the small valve sleeve provided by the embodiment of the present application. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0029] Figure 1 is a flow chart of the method for realizing the complex machining matching relationship structuring of the aerospace servo valve provided by the embodiment of the present application. As shown in Figure 1 , the method for realizing the complex machining matching relationship structuring of the aerospace servo valve includes:

[0030] S1, determining the feature of the size matching of the part and the matching type of the part;

[0031] S2, determining the parent part and the child part according to the feature of the size matching of the part and the matching type of the part;

[0032] S3, determining the matching logic between the parent part and the child part, obtaining the matching logic mathematical model according to the matching logic, and obtaining the feature value of the size matching of the child part according to the matching logic mathematical model;

[0033] S4, creating matching basic data in a CAPP (Computer Aided Process Planning) system according to the matching logic between the parent part and the child part;

[0034] S5, creating structured processes of the parent part and the child part in the CAPP system;

[0035] S6, obtaining the matching relationship between the parent part and the child part, the attribute of the parent part, the attribute of the child part and the matching attribute of the parent part and the child part according to the matching basic data and the structured processes of the parent part and the child part;

[0036] S7, associating the size requirement of the size-matching feature of the child part with the matching relationship between the parent part and the child part, the size requirement of the size-matching feature of the parent part respectively to obtain the association data of the parent part and the child part.

[0037] As shown in the method further comprises the following steps: Figure 1

[0038] S8, issuing the structured process data to a MES (Manufacturing Execution System) system, wherein the structured process data comprises the structured processes of the parent part and the child part in step S5, the matching relationship between the parent part and the child part, the attribute of the parent part, the attribute of the child part and the matching attribute of the parent part and the child part in step S6, the association data of the parent part and the child part in step S7, and the process BOM of the child part and the parent part.

[0039] S9, performing matching in the MES system.

[0040] It should be understood that the two steps of step S8 and step S9 are optional in the method, and the absence of the two steps does not affect the integrity of the embodiment.

[0041] In step S1, the matching basic data is created in the CAPP system. The features of the parts involved in the size matching and the matching types in the production process of the servo valve are sorted out, the features of the part size matching cover the size features of the hole, the circle and the length, and the matching types cover the gap, the interference and the protrusion, and the part matching relationship logic network is established. The features of the part size matching include the hole, the circle and the length; the matching types of the part include the gap, the interference and the protrusion.

[0042] ​In step S2, when the part matching type is gap and interference, the parent part is a part with machined bore features, and the child part is a part with machined external features; when the part matching type is convex amount, the parent part is a shell part, and the child part is a valve sleeve part. In the machining process, the matching types such as gap and interference are usually based on the hole, that is, the part with machined bore features is taken as the parent part, and the part with machined external features is taken as the child part; the matching type of convex amount is usually based on the shell part matching the valve sleeve or small valve sleeve, so the shell part is taken as the parent part, and the valve sleeve part is taken as the child part.

[0043] In step S3, the matching logic between the parent part and the child part includes one-to-one and one-to-many; the one-to-one means that one child part matches one parent part, and the one-to-many means that one child part matches two parent parts. Specifically, according to the different types of parent part quantity, the matching logic can be divided into the following two kinds: 1) one-to-one, that is, one child part matches one parent part; 2) one-to-many, that is, one child part matches two parent parts. At the same time, the position needs to be distinguished when matching, for example, the number of positions of the parent part that need to be matched with the child part is N, that is, the number of child parts needed is N.

[0044] When the child part and the parent part are interference matched, the mathematical model is b-A=+(x1-x2); when the child part and the parent part are interference matched, the mathematical model is b-A=-(x1-x2); when the child part and the two parent parts are convex amount matched, the mathematical model is b+B-A=+(x1-x2); wherein b is the size matching feature attribute value of the child part, A is the size matching feature attribute value of the parent part, B is the size matching feature attribute value of the second parent part, x1-x2 is the matching requirement value range, x1 is the minimum value of the matching requirement value, and x2 is the maximum value of the matching requirement value.

[0045] The matching logic of the coupled parts is converted into mathematical operation. Through the matching requirements of the parent and child parts, a mathematical model is established, that is, when the child part is machined, the required index range needs to be calculated according to the value of the parent part.

[0046] ① The child part and the parent part are interference matched, and the conversion mathematical model is b-A=+(x1-x2), wherein b is the size matching feature attribute value of the child part; A is the size matching feature attribute value of the parent part; x1-x2 is the matching requirement value range, and the interference matching requirement value is positive; x1 is the minimum value of the matching requirement value, and x2 is the maximum value of the matching requirement value.

[0047] (2) Sub-item parts and parent parts clearance fit, conversion mathematical model: b-A = -(x1-x2), wherein: b is the size of the feature attribute value of the sub-item parts; A is the size of the feature attribute value of the parent parts; x1-x2 is the range of the required value, and the clearance fit required value is positive.

[0048] (3) Sub-item parts and two parent parts protrusion fit, conversion mathematical model: b+B-A = +(x1-x2), wherein: b is the size of the feature attribute value of the sub-item parts; A is the size of the feature attribute value of the parent parts; B is the size of the feature attribute value of the second parent parts; x1-x2 is the range of the required value, and the protrusion fit required value is positive.

[0049] In step S4, the matching basic data includes product grouping, parent parts and sub-item parts, parent part size fit features and sub-item part size fit features, parent part material code and sub-item part material code, parent part feature required value and sub-item part feature required value.

[0050] As shown in Figure 2 , the basic data of creating parent parts and sub-item parts in the CAPP system includes:

[0051] S41, creating product grouping: creating product grouping in the CAPP system classification management module, product name including servo valve or other products;

[0052] S42, creating part classification: parent parts and sub-item parts. Create matching parts under the product level node, such as valve core, valve sleeve and other parts;

[0053] S43, creating part feature attribute: creating part matching feature attribute under the part level node, including outer circle, hole, length and other feature attributes.

[0054] S44, part material code binding: binding the material code of the corresponding part of the product under the part level of the CAPP system classification application module, completing the binding of the feature and the part;

[0055] S45, maintaining feature required value: maintaining the required value of the part fit feature after the part is bound, i.e. outer circle required value, hole required value, etc.

[0056] In step S5, creating structured process of parent parts and structured process of sub-item parts in the CAPP system includes the following steps:

[0057] S51, find the process BOM (bill of materials) of the sub-item parts and the parent parts in the CAPP system, and create a new process under the process BOM and maintain the process basic information;

[0058] S52, establishing a structured process route, writing process content, and completing the main content of the structured process;

[0059] S53, maintaining associated object information at the process level. In the resource module, process resources (including process equipment, devices, and standard tools) are maintained for the specified process level. In the quality record module, structured dimensional inspection records are maintained. In the document module, process diagrams or process three-dimensional models are uploaded.

[0060] In step S6, the parent part and the child part are established in the supporting relationship in the supporting process in the structured process of the CAPP system sub-item part. The supporting attributes of the child part and the parent part are maintained in the supporting relationship extension attribute. The parent part attributes include: parent part code, parent part name, parent part multiplier, parent part attribute number, parent part position, parent part attribute, parent part supporting process, and parent part interrelationship. The child part attributes include: child part code, child part name, child part multiplier, child part attribute number, child part position, and child part attribute. The supporting attributes of the parent part and the child part include the corresponding supporting table, parent part dimensional requirements, child part dimensional requirements, supporting technical requirements, min interference amount, and max interference amount.

[0061] In step S7, the supporting dimensions are entered and the structured supporting relationship is associated. In the supporting process of the parent part and the child part, the structured dimensional inspection requirements are entered. The child part supporting dimensional inspection requirements can be associated with the parent part dimensional inspection and the associated supporting relationship. Thus, the logical binding of the parent part supporting process dimensions is completed, and the basic requirements for the automatic calculation of the supporting process dimensions in the MES system are met.

[0062] Further, in step S8, the process data covers the servo valve process BOM (process manufacturing design list) (including the parent part and the child part), the parent part and the child part structured process, and the structured process including the structured supporting attributes and the structured dimensions of the supporting process.

[0063] Further, in step S9, as shown in Figure 3 , the MES system performs supporting, including the following sub-steps:

[0064] S91, executing the parent part production process to generate the parent part code: in the MES system, the parent part code is generated according to the plan requirements;

[0065] S92, recording the actual value detection results of the parent part dimensional fitting features: in the MES system, the dimensional detection results of the parent part feature attributes are recorded by the inspection personnel after production execution;

[0066] S93, generating the child part code: in the MES system, the child part code is generated according to the plan requirements;

[0067] S94, select the mating parent part code of the child part: in the MES system, select the mating parent part code of the child part according to the production needs;

[0068] S95, execute the child part production process, and record the actual value detection results of the size matching features of the child part: in the MES system, the structured mating relationship transmitted from the CAPP system can be used for size calculation, and the qualified size range can be automatically calculated. The mating features of the child part are machined according to the size range to ensure the accuracy of the mating size.

[0069] S96, select the parent part and execute the child part mating: in the MES system, the part number of the mating attribute meeting the process requirements is bound, and the MES system records the mating relationship.

[0070] A method for realizing the structured mating relationship of complex machining of aerospace servo valve includes the following two application scenarios:

[0071] Scenario 1, one-to-one scenario: one child part mates with one parent part, such as the interference amount of the outer circle of the pin and the inner hole of the shell being 0.004-0.010 mm, and the shell 1 mates with the pin 4. The mating schematic diagram of the shell 1 and the pin 4 is shown in FIG. 5(a) and FIG. 5(b). Figure 4 The shell 1 is the parent part, and the pin 4 is the child part. The shell has six positions that mate with the pin, as shown in FIG. 5(a) and FIG. 5(b), and the positions are P1, P2, P3, P4, P5, and P6.

[0072] According to the method for realizing the structured mating relationship of complex machining of aerospace servo valve, the following steps are carried out:

[0073] S1, establish the features of part size matching and the mating type. The features of size matching are the outer circle of the pin and the inner hole of the shell, and the mating type is interference fit.

[0074] S2, establish the parent part and the child part. The child part is the pin, and the parent part is the shell.

[0075] S3, establish the mating logic between the parent part and the child part. The mating logic is one-to-one, the outer circle of the child pin mates with the inner hole of the parent shell, the parent shell has six positions that mate with the child pin, and the positions are P1-P6. The number of child pins is six. Convert to the mathematical model: b-A=0.004-0.010, b is the size requirement of the pin outer circle, and A is the size requirement of the shell inner hole. The pin outer circle size index range: b=A+0.004-0.010

[0076] S4, create mating basic data in the CAPP system. The process personnel create the mating basic data of the parent shell and the child pin in the CAPP system.

[0077] S5, creating a structured process of matched parts in the CAPP system. The process personnel compile the structured process of the parent part shell and the child part pin.

[0078] S6, creating matched relationships and maintaining matched attributes in the matched process. The process personnel establish matched relationships in the pin machining outer diameter dimension process of the child part, and maintain matched attributes of the child part and the parent part in the matched relationship extension attributes. The matched attribute table of the child part and the parent part is as follows:

[0079]

[0080]

[0081] S7, entering matched dimensions and associating structured matched relationships in the matched process. The process personnel enter structured dimension detection requirements in the matched process of the parent part and the child part, associate the pin b dimension with the shell A dimension and the maintained matched relationship, and complete the logical binding of the matched process dimensions of the parent part.

[0082] S8, issuing structured process data to the MES system.

[0083] S9, completing automatic matching of matched parts and automatic calculation of matched machining dimensions in the MES system.

[0084] Scenario 2, one-to-many scenario: one child part is matched with two parent parts, such as the total length of the large valve sleeve and the two small valve sleeves is 0.08-0.12 mm longer than the shell. The shell, the large valve sleeve, and the small valve sleeve are shown in the cooperation schematic diagram of the shell, the large valve sleeve, and the small valve sleeve. Figure 6 The shell 1 and the large valve sleeve 2 are parent parts, and the left small valve sleeve 3.1 and the right small valve sleeve 3.2 are child parts.

[0085] According to the method and process of structuring the matched relationship of complex machining of aerospace servo valve, the following steps are carried out:

[0086] S1, determining the features of part dimension cooperation and matched type. The features of dimension cooperation are the length of the shell, the length of the large valve sleeve, and the length of the small valve sleeve, and the matched type is the protrusion amount cooperation.

[0087] S2, determining the parent part and the child part. This matched scenario has one child part and two parent parts. The child part is the small valve sleeve, the parent part 1 is the shell, and the parent part 2 is the large valve sleeve.

[0088] S3, establish the matching logic between the parent part and the child part. The matching logic is one-to-many, which is converted into a conversion mathematical model: 2c+B-A=0.08~0.12, A is the length dimension of the shell, B is the length dimension requirement of the large valve sleeve, and c is the length dimension requirement of the small valve sleeve. The length dimension index range of the small valve sleeve: c=(A+0.08~0.12-B) / 2

[0089] S4, create matching basic data in the CAPP system. The process personnel create the matching basic data of the parent part 1 shell, the parent part 2 large valve sleeve, and the child part small valve sleeve in the CAPP system.

[0090] S5, create matching part structured process in the CAPP system. The process personnel compile the structured process of the parent part 1 shell, the parent part 2 large valve sleeve, and the child part small valve sleeve.

[0091] S6, create matching relationship and maintain matching attributes in the matching process. The process personnel establish the matching relationship in the length dimension process of the child part small valve sleeve, and maintain the matching attributes of the child part and the parent part in the matching relationship extension attributes. The matching attribute table of the child part and the parent part is as follows:

[0092]

[0093] Note: ①The fit is interference fit, and the fit amount is positive. The fit amount is negative when the fit is clearance fit

[0094] ②The size is the matching processing size

[0095] S7, enter the matching size and associate the structured matching relationship in the matching process. The process personnel enter the structured size detection requirement in the matching process of the parent part and the child part, associate the size c of the child part small valve sleeve with the size A of the parent part 1 shell, the size B of the parent part 2 large valve sleeve, and the associated and maintained matching relationship, and complete the logical binding of the size in the matching process with the parent part.

[0096] S8, issue the structured process data to the MES system.

[0097] S9, complete the automatic matching of the matching parts and the automatic calculation of the matching processing size in the MES system.

[0098] By establishing the matching relationship between the parts through the CAPP system, maintaining the related matching attributes, establishing the machining constraint relationship in the assembly, and automatically generating the processing size of the corresponding part in the MES, the original manual calculation method of the operator is changed, the work efficiency, standardization and accuracy are improved, and the quality data structure requirement is realized. This method can provide strong technical support for the quality data structure of similar precision matching machining of servo valves.

[0099] The embodiment also provides a system for realizing structuralization of complex machining matching relationship of aerospace servo valve, which comprises: a first module for determining the matching type and the feature of the size of a part; a second module for determining a parent part and a child part according to the matching type and the feature of the size of the part; a third module for determining the matching logic between the parent part and the child part, obtaining a matching logic mathematical model according to the matching logic, and obtaining the feature value of the size of the child part according to the matching logic mathematical model; a fourth module for creating matching basic data in a CAPP system according to the matching logic between the parent part and the child part; a fifth module for creating the structuralized process of the parent part and the structuralized process of the child part in the CAPP system; a sixth module for obtaining the matching relationship between the parent part and the child part, the attribute of the parent part, the attribute of the child part and the matching attribute of the parent part and the child part according to the matching basic data and the structuralized process of the parent part and the structuralized process of the child part; and a seventh module for associating the size requirement of the feature of the size of the child part with the matching relationship between the parent part and the child part and the size requirement of the feature of the size of the parent part respectively, and obtaining the associated data of the parent part and the child part.

[0100] The embodiment adopts the parent-child relationship logic, sets different scenes and establishes mathematical models correspondingly, calculates the index range to be reached according to the value of the parent part when the child part is machined, and realizes automatic calculation of matching data; the embodiment realizes structuralized maintenance of matching data information of coupled parts by using the CAPP system, realizes paperless transmission of quality data, and avoids quality errors caused by human recognition in the production site; the embodiment realizes interaction of matching data of coupled parts by using the structuralized means, establishes dynamic association of matching sizes and matching processes, realizes closed loop of matching data link when repairing, and improves the working efficiency of machining of coupled parts in the production process; the embodiment realizes structuralized storage of matching original data in the system, realizes structured data follow-up query, facilitates data use such as technical problem analysis, review and recheck, and realizes the function of aggregation and analysis of servo valve matching original data; the embodiment converts the matching logic into mathematical operation by introducing the concept of parent-child relationship, establishes the relationship between the matching size chain, maintains the relevant structuralized matching attribute by using the CAPP system, realizes structuralization of matching data information, changes the original paper record working mode, avoids quality errors caused by human recognition in the production site, and improves the working efficiency of machining of coupled parts in the production process.

[0101] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A method for structuring the complex machining and matching relationship of aerospace servo valves, characterized in that include: Determine the characteristics of part size matching and part matching types; Determine the parent part and child part based on the features of part size matching and part matching type; Determine the matching logic between the parent part and the child part, obtain a matching logic mathematical model based on the matching logic, and obtain the characteristic value of the size matching of the child part based on the matching logic mathematical model; Create supporting basic data in the CAPP system based on the supporting logic between parent parts and child parts; Create structured processes for parent parts and child parts in the CAPP system; According to the basic supporting data and the structured process of the parent part and the structured process of the child part, the supporting relationship between the parent part and the child part, the parent part attributes, the child part attributes and the supporting attributes of the parent part and the child part are obtained; The size requirements of the size matching features of the child part are associated with the matching relationship between the parent part and the child part, and the size requirements of the size matching features of the parent part, to obtain the association data of the parent part and the child part.

2. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: The characteristics of part size matching include inner hole, outer circle and length; the types of part matching include clearance, interference and protrusion.

3. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: When the part matching type is clearance and interference, the parent part is the part for machining inner hole features, and the child part is the part for machining outer circle features; when the part matching type is protrusion, the parent part is a shell part, and the child part is a valve sleeve part.

4. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1 is characterized in that: The matching logic between parent parts and child parts includes one-to-one and one-to-many. Among them, one-to-one means that one child part is matched with one parent part; one-to-many means that one child part is matched with two parent parts.

5. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1 or 4, characterized in that: When the child part and the parent part have an interference fit, the mathematical model is: bA = + (x1 ~ x2); When the child part and the parent part have an interference fit, the mathematical model is: bA = -(x1 ~ x2); When the child part is matched with the protrusion of two parent parts, the mathematical model is: b + BA = + (x1 ~ x2); Among them, b is the characteristic attribute value of the dimensional fit of the child part, A is the characteristic attribute value of the dimensional fit of the parent part, B is the characteristic attribute value of the dimensional fit of the second parent part, x1~x2 is the range of the fit requirement value, x1 is the minimum value of the fit requirement value, and x2 is the maximum value of the fit requirement value.

6. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: The supporting basic data includes product grouping, parent parts and child parts, parent part size matching characteristics and child part size matching characteristics, parent part material code and child part material code, parent part feature requirement value and child part feature requirement value.

7. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: Parent part properties include: parent code, parent name, parent multiplication, parent attribute quantity, parent position, parent attribute, parent supporting process, and relationship between parent items.

8. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: Sub-item part properties include: sub-item code, sub-item name, sub-item multiplication, sub-item property quantity, sub-item position, and sub-item properties.

9. The method for structuring complex machining and matching relationships of aerospace servo valves according to claim 1, characterized in that: The matching properties of parent parts and child parts include the matching table, parent size requirements, child size requirements, matching technical requirements, minimum interference, and maximum interference.

10. A system for structuring complex machining and matching relationships of aerospace servo valves, characterized in that include: The first module is used to determine the characteristics of part size matching and part matching types; The second module is used to determine the parent part and child part according to the characteristics of part size matching and part matching type; The third module is used to determine the matching logic between the parent part and the child part, obtain the matching logic mathematical model based on the matching logic, and obtain the characteristic value of the size matching of the child part based on the matching logic mathematical model; The fourth module is used to create supporting basic data in the CAPP system based on the supporting logic between parent parts and child parts; The fifth module is used to create the structured process of parent parts and the structured process of child parts in the CAPP system; The sixth module is used to obtain the matching relationship between the parent part and the child part, the parent part attributes, the child part attributes and the matching attributes of the parent part and the child part based on the matching basic data and the structured process of the parent part and the structured process of the child part; The seventh module is used to associate the size requirements of the size matching features of the child parts with the matching relationship between the parent part and the child parts and the size requirements of the size matching features of the parent part to obtain the association data of the parent part and the child parts.

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