Model-driven superplastic forming equipment digital prototype demand design method

Abstract

The invention discloses a superplastic forming equipment digital prototype demand design method based on model driving. The method comprises the following steps: firstly, constructing an overall demand model of superplastic forming equipment according to a superplastic forming process; secondly, refining functional requirements according to the requirements of all dimensions of the superplastic forming process, refining non-functional requirements according to the requirements of all dimensions which do not directly participate in the process and production, and constructing a design requirement model of superplastic forming equipment; and finally, each superplastic forming process is subdivided into component motion, the component motion is summarized to different systems according to component functions, and a use case diagram of superplastic forming equipment is constructed. According to the demand design method, on the basis of modeling expression, each design team of the digital prototype can conveniently understand and collaborate demands, and the design efficiency is improved; and case graph expression is added in demand design, and the superplastic forming process and the system are subjected to demand association, so that the association among the demand, the process and the system and the design efficiency of the digital prototype are improved.

Description

Technical Field

[0001] The invention relates to the field of computer-aided design, and more specifically to a model-driven superplastic forming equipment digital prototype demand design method. Background Art

[0002] Superplastic forming technology uses the superplasticity of materials to achieve one-time precision forming of complex parts, improve part performance and precision, promote product lightweight design, reduce connectors, reduce costs, and enhance structural durability and damage tolerance. With the advancement of science and technology, superplastic forming technology will be more widely used in the manufacture of large and complex structural parts. Therefore, the design of superplastic forming equipment faces greater challenges.

[0003] The application of digital prototypes in equipment design brings many advantages. On the one hand, digital prototypes can not only effectively improve the efficiency and accuracy of equipment design: without a large number of physical tests, the design can be verified and optimized by simulating the superplastic forming equipment in a computer environment, shortening the design cycle and reducing costs while improving the accuracy and reliability of the design; on the other hand, digital prototypes can also effectively improve the coordination of equipment design: digital prototype design breaks the technical barriers in the traditional design process, uses a unified digital description and collaborative work platform, realizes the seamless integration of various teams, and enables close cooperation and parallel design among multiple disciplines such as mechanics, electronics, hydraulics, and control.

[0004] Requirements design is the first and most important step in digital prototype design. Requirements design is responsible for guiding the overall design direction of superplastic forming equipment, ensuring that the equipment functions meet the expected requirements, allocating resources, and improving overall R&D efficiency. The existing requirements for digital prototypes of superplastic forming equipment mainly rely on text descriptions. However, it is difficult for text descriptions to intuitively and effectively establish the equipment requirement system and the relationship between requirements and various system equipment, which hinders the collaborative communication of subsequent digital prototype design teams and reduces the efficiency of digital prototype design. In addition, due to the ambiguity of text expression, text-based requirement expression is prone to misunderstanding of requirements, and will also hinder the collaborative communication of various digital prototype design teams, further reducing the efficiency of digital prototype design. Summary of the invention

[0005] In view of this, the present invention provides a model-driven superplastic forming equipment digital prototype demand design method, which facilitates the collaborative communication among digital prototype design teams and improves the digital prototype design efficiency.

[0006] To achieve the above objectives, the proposed solution is as follows: A method for designing digital prototype requirements of superplastic forming equipment based on model driving includes the following steps: According to the superplastic forming process, an overall demand model of superplastic forming equipment is constructed, and the overall demand model includes functional requirements and non-functional requirements; Refine the functional requirements according to the requirements of each dimension of the superplastic forming process, and refine the non-functional requirements according to the requirements of each dimension that is not directly involved in the process and production, and build a design requirement model for superplastic forming equipment; Each superplastic forming process is subdivided into component movements, and the movements of each component are classified into different systems according to the function of the component, and a use case diagram of superplastic forming equipment is constructed.

[0007] Preferably, the functional requirements include: heating process, loading process, mold closing process, reverse bulging process, forward bulging process, cooling process and unloading process; The non-functional requirements include economic requirements, environmental protection requirements and safety requirements.

[0008] Preferably, the process of refining non-functional requirements according to the requirements of various dimensions that are not directly involved in the process and production includes: The economic requirements are broken down into overall cost, production efficiency and material utilization; The environmental protection needs are broken down into energy consumption and waste disposal; The safety requirements are broken down into electricity and circuit safety requirements, gas storage and use safety requirements, and mechanical structure operation safety requirements.

[0009] Preferably, the process of refining the functional requirements according to the requirements of each dimension of the superplastic forming process includes: Refine the functional requirements to the system level according to the steps, functional requirements and performance requirements in each process; Break down functional requirements from the system level to the component level.

[0010] Preferably, the process of refining the functional requirements to the system level according to the steps, functional requirements and performance requirements in each process includes: The heating process is subdivided into heating system requirements and temperature control system requirements; The loading process is refined into logistics system requirements and furnace door control requirements; The mold closing process is refined to meet the requirements of hydraulic press; The forward bulging forming process and the reverse bulging forming process are refined into air path system requirements, mold design requirements and mold connection requirements; The cooling process is subdivided into cooling system requirements, temperature and control requirements, and furnace door control requirements; The material unloading process is refined into the logistics system requirements.

[0011] Preferably, the process of subdividing each superplastic forming process into component movements, and classifying the component movements into different systems according to the component functions, and constructing a use case diagram of the superplastic forming equipment includes: Break down each superplastic forming process into component-level requirements; Break down component-level requirements into component movements; Determine the relationship between each superplastic forming process and different systems and components, and construct a use case diagram of superplastic forming equipment.

[0012] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: The method for designing the requirements of digital prototypes of superplastic forming equipment based on model-driven technology provided by the present invention firstly constructs the overall requirements model of superplastic forming equipment; then refines the functional requirements according to the requirements of each dimension of the superplastic forming process, and refines the non-functional requirements according to the requirements of each dimension that is not directly involved in the process and production, and constructs the design requirements model of superplastic forming equipment; finally, each superplastic forming process is subdivided into component movements, and the movements of each component are summarized into different systems according to the function of the component, and the use case diagram of the superplastic forming equipment is constructed. The present invention bases the requirement design on modeling expression, which is more specific than text expression, avoids the ambiguity of text expression, facilitates the understanding and coordination of requirements by each design team of the digital prototype, lays the foundation for digital prototype design and collaborative communication, and improves the design efficiency of the digital prototype.

[0013] The present invention adds use case diagram expression to the demand design of the digital prototype of superplastic forming equipment, and associates the superplastic forming process with the system demand. This not only improves the correlation between the demand, process and system, but also facilitates the collaborative communication between the various design teams of the digital prototype, further improving the design efficiency of the digital prototype. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 A flow chart of a method for designing digital prototypes of superplastic forming equipment based on model drive provided in an embodiment of the present invention; Figure 2 A principle block diagram of a model-driven superplastic forming equipment digital prototype requirement design method provided in an embodiment of the present invention; Figure 3a-3gDetailed schematic diagrams of different functional requirements provided by embodiments of the present invention; Figure 4a-4c Detailed schematic diagrams of different non-functional requirements provided by embodiments of the present invention; Figure 5 A mold closing process example diagram provided by an embodiment of the present invention; Figure 6 A temperature rise process example diagram provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] First, combine Figure 1 A model-driven superplastic forming equipment digital prototype requirement design method provided in an embodiment of the present invention is introduced. The requirement design method in the embodiment of the present invention can be implemented based on MWORKS.Sysbuilder, which is a model-based system design tool for complex engineering systems, with requirements import, architecture modeling, logic simulation and analysis and evaluation functions. Figure 1 As shown, the method includes: Step S01, constructing an overall demand model of superplastic forming equipment according to the superplastic forming process.

[0018] Specifically, based on SysML language, an overall demand model of superplastic forming equipment is constructed, wherein the overall demand model includes functional requirements and non-functional requirements.

[0019] like Figure 2 As shown, from the perspective of superplastic forming process, different processes including heating, loading, mold closing, reverse bulging, forward bulging, cooling, and unloading are included. Combined with process requirements, performance requirements, functional requirements, etc., a normative definition is made for the functions and requirements of the superplastic forming process to obtain functional requirements. Among them, the functional requirements include heating process, loading process, mold closing process, reverse bulging, forward bulging, cooling process, and unloading process.

[0020] like Figure 2As shown in the figure, from the perspectives of structural requirements, cost requirements, safety requirements and environmental protection requirements of superplastic forming equipment, the non-process functions and requirements of superplastic forming equipment are normatively defined to obtain non-functional requirements. Among them, non-functional requirements include economic requirements, environmental protection requirements and safety requirements.

[0021] According to the functional demand model and non-functional demand model, the overall demand model of superplastic forming equipment is formed, which is expressed as follows: Figure 2 The top-level requirement diagram of the overall requirement model is shown.

[0022] Step S02, refine the functional requirements according to the requirements of each dimension of the superplastic forming process, and refine the non-functional requirements according to the requirements of each dimension not directly involved in the process and production, and build a design requirement model for superplastic forming equipment.

[0023] Specifically, based on the constructed overall demand model, the functional and non-functional requirements are refined, first dividing the requirements into system levels, and then refining the system requirements into component levels.

[0024] 1. Refine the functional requirements according to the requirements of each dimension of superplastic forming process: The functional requirements are refined according to the requirements of each dimension of the superplastic forming process, and the functional requirements are refined to the system level according to the steps, functional requirements and performance requirements in each process. Figure 3a-3g As shown: the heating process is refined into heating system requirements and temperature control system requirements; the loading process is refined into logistics system requirements and furnace door control requirements; the mold closing process is refined into hydraulic press requirements; the forward inflation forming process and the reverse inflation forming process are refined into air path system requirements, mold design requirements and mold connection requirements; the cooling process is refined into cooling system requirements, temperature and control requirements, and furnace door control requirements; the unloading process is refined into logistics system requirements.

[0025] Refine the functional requirements from the system level to the component level. Figure 3a-3g As shown in the figure, the heating system requirements are subdivided into heating requirements and insulation and connection requirements; the temperature control system requirements are subdivided into PLC and PID, etc. In addition, the requirements at the component level can be further refined.

[0026] 2. Refine non-functional requirements according to the requirements of various dimensions that are not directly involved in the process and production: Based on the overall requirements model, the non-functional requirements are further refined into each system. Figure 4a-4cAs shown in the figure, economic requirements are broken down into overall cost, production efficiency, and material utilization; environmental requirements are broken down into energy consumption and waste disposal; safety requirements are broken down into electricity and circuit safety requirements, gas storage and use safety requirements, and mechanical structure operation safety requirements. Further definitions and refinements are made to each type of safety requirement, for example, the power circuit safety requirement is further broken down into circuit design safety, use and maintenance safety, emergency response and plans, etc.

[0027] After refining both functional and non-functional requirements, the design requirement model of superplastic forming equipment is obtained, such as Figure 2 The expression shown is the design requirement diagram of superplastic forming equipment.

[0028] Step S03, subdividing each superplastic forming process into component movements, and classifying each component movement into different systems according to the component function, to construct a use case diagram of the superplastic forming equipment.

[0029] Specifically, each superplastic forming process is first subdivided into component-level requirements. Figure 5 As shown: the mold closing process is subdivided into hydraulic press control requirements, clamping force control requirements and temperature control requirements. Then, the requirements at the component level are refined into the movement of each component. For example, the hydraulic press control requirements are subdivided into pump oil supply requirements, hydraulic rod extension requirements and slider positive stroke descent requirements. Since the requirements of each process step are completed by the collaboration of components of different systems, different processes may have the same system components working. For example: in the heating, mold closing, inflation, and cooling processes, temperature changes must be controlled. Therefore, in these processes, the thermocouple components of the heating system measure the temperature and transmit the temperature information to the temperature control system. In the demand design, it is necessary to clarify the relationship and clarify the intersection of each system and component to prevent misunderstandings between subsequent system design teams, which will hinder collaborative communication. Therefore, it is necessary to determine the relationship between each superplastic forming process and each system and component, subdivide each superplastic forming process into component movement, and classify the movement of each component into different systems according to the function of the component to construct a use case diagram of superplastic forming equipment. For example, the use case diagram of the heating process is as follows Figure 6 As shown in the figure, the heating process is subdivided into heating demand and temperature control demand, among which heating tube heating, insulation board and thermocouple temperature measurement belong to heating demand, so they are classified into the heating system, and PLC control belongs to temperature control demand, so it is classified into the temperature control system, which can show the relationship between the heating process and demand, heating system and temperature control system, and draw a superplastic forming equipment use case diagram.

[0030] The embodiment of the present invention provides a model-driven requirement design method for digital prototype of superplastic forming equipment. First, an overall requirement model of superplastic forming equipment is constructed. Then, the functional requirements are refined according to the requirements of each dimension of the superplastic forming process, and the non-functional requirements are refined according to the requirements of each dimension that is not directly involved in the process and production, and a design requirement model of superplastic forming equipment is constructed. Finally, the superplastic forming process is subdivided into the movement of each component, and each superplastic forming process is subdivided into the movement of components, and the movement of each component is summarized into different systems according to the function of the component, and a use case diagram of the superplastic forming equipment is constructed. The embodiment of the present invention bases the requirement design on modeling expression, which is more specific than textual expression, avoids the ambiguity of textual expression, facilitates the understanding and coordination of requirements by various design teams of digital prototypes, lays a foundation for digital prototype design and collaborative communication, and improves the design efficiency of digital prototypes.

[0031] The embodiment of the present invention adds use case diagram expression to the demand design of the digital prototype of superplastic forming equipment, and associates the superplastic forming process with the system demand. This not only improves the correlation between the demand, process and system, but also facilitates the collaborative communication between the various design teams of the digital prototype, further improving the design efficiency of the digital prototype.

[0032] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0033] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A model-driven superplastic forming equipment digital prototype demand design method, characterized in that: The following steps are involved: According to the superplastic forming process, an overall demand model of superplastic forming equipment is constructed, and the overall demand model includes functional requirements and non-functional requirements; Refine the functional requirements according to the requirements of each dimension of the superplastic forming process, and refine the non-functional requirements according to the requirements of each dimension that is not directly involved in the process and production, and build a design requirement model for superplastic forming equipment; Each superplastic forming process is subdivided into component movements, and the movements of each component are classified into different systems according to the function of the component, and a use case diagram of superplastic forming equipment is constructed.

2. The method for designing digital prototypes of superplastic forming equipment based on model drive according to claim 1 is characterized in that: The functional requirements include: heating process, loading process, mold closing process, reverse bulging process, forward bulging process, cooling process and unloading process; The non-functional requirements include economic requirements, environmental protection requirements and safety requirements.

3. The method for designing digital prototypes of superplastic forming equipment based on model drive according to claim 2 is characterized in that: The process of refining non-functional requirements according to the requirements of various dimensions that are not directly involved in the process and production includes: The economic requirements are broken down into overall cost, production efficiency and material utilization; The environmental protection needs are broken down into energy consumption and waste disposal; The safety requirements are broken down into electricity and circuit safety requirements, gas storage and use safety requirements, and mechanical structure operation safety requirements.

4. The method for designing digital prototypes of superplastic forming equipment based on model drive according to claim 2 is characterized in that: The process of refining the functional requirements according to the requirements of each dimension of the superplastic forming process includes: Refine the functional requirements to the system level according to the steps, functional requirements and performance requirements in each process; Break down functional requirements from the system level to the component level.

5. The method for designing digital prototypes of superplastic forming equipment based on model drive according to claim 4 is characterized in that: The process of refining the functional requirements to the system level according to the steps, functional requirements and performance requirements in each process includes: The heating process is subdivided into heating system requirements and temperature control system requirements; The loading process is refined into logistics system requirements and furnace door control requirements; The mold clamping process is refined to meet the requirements of hydraulic presses; The forward bulging forming process and the reverse bulging forming process are refined into air path system requirements, mold design requirements and mold connection requirements; The cooling process is subdivided into cooling system requirements, temperature and control requirements, and furnace door control requirements; The material unloading process is refined into the logistics system requirements.

6. The method for designing digital prototype requirements of superplastic forming equipment based on model drive according to any one of claims 1 to 5, characterized in that: The process of subdividing each superplastic forming process into component movements, and classifying the component movements into different systems according to the component functions, and constructing a use case diagram of superplastic forming equipment includes: Break down each superplastic forming process into component-level requirements; Break down component-level requirements into component movements; Determine the relationship between each superplastic forming process and different systems and components, and construct a use case diagram of superplastic forming equipment.

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