A twin-screw extruder screw combination design method and device and a storage medium

Abstract

The application relates to the technical field of double-screw extruders, and particularly discloses a double-screw extruder screw combination design method, a device and a storage medium, the method comprising the following steps: constructing an assembly library, classifying and managing screw and barrel assemblies, importing and analyzing CAD drawings, extracting element parameters and saving assembly snapshots; establishing a machine type configuration tree, constructing a multi-level configuration tree containing series, machine types, a barrel library, a thread library, a production line and configuration items, automatically creating container nodes for machine types and the production line; combination assembly, selecting a barrel and screw elements to add to an assembly area, layering screw elements according to upper and lower layers and calculating the total length of the combination in real time; visual checking and exporting, generating a CAD three-dimensional preview and combination drawing code, and providing a print preview and a vector PDF drawing export. The application can realize unified management of an element library, configuration structured modeling, combination assembly automation and the like, improves screw combination design efficiency and accuracy, reduces the manual error rate, and realizes configuration standardization and traceability.

Description

Technical Field

[0001] This invention relates to the field of twin-screw extruder technology, and in particular to a twin-screw extruder screw assembly design method, apparatus, and storage medium. Background Technology

[0002] A twin-screw extruder consists of two parallel screws rotating in the same or opposite directions. It is widely used in the plastics, rubber, chemical, and food industries for material mixing and granulation. The screw assembly of a twin-screw extruder comprises various types of components, including screw conveying elements, kneading blocks (mixing elements), and gear components (toothed discs). These components are arranged sequentially on the mandrel according to process requirements, forming a screw assembly with specific conveying, plasticizing, and mixing functions.

[0003] In actual production, the same model of twin-screw extruder requires different screw combinations depending on the processed materials and process requirements. Furthermore, different manufacturers and models offer a wide variety of component models and specifications (e.g., threaded parts, kneading blocks, etc., are subdivided according to parameters such as direction of rotation, angle, and fillet radius), resulting in complex component naming and parameter systems. Traditional screw combination design primarily relies on engineers manually reviewing drawings, arranging components by hand, and calculating the combination length, which has the following shortcomings:

[0004] (1) Low design efficiency: Engineers need to manually check the drawings, manually arrange the components, and calculate the combination length one by one. Manual arrangement and length calculation are time-consuming and it is difficult to quickly respond to the configuration requirements of different processes. Furthermore, component selection and arrangement rely on personal experience and lack standardized verification, which can easily lead to arrangement errors or length discrepancies.

[0005] (2) Data is scattered: Components such as threaded parts and kneading blocks are subdivided according to parameters such as direction of rotation, angle, and fillet. There are many models and specifications, and the naming system is complex. Configuration data of barrels, screws, production lines, etc. are scattered in different drawings and tables, lacking unified management and difficult to reuse and trace.

[0006] (3) Isolated configuration data: There is a lack of correlation and synchronization mechanism between the configuration of the barrel, screw and production line. After the source changes, the downstream configuration is difficult to update automatically, which easily leads to data inconsistency;

[0007] (4) Insufficient visualization: Traditional methods make it difficult to preview the three-dimensional shape of the screw assembly intuitively, which is not conducive to design verification and customer communication.

[0008] Therefore, there is a need for a screw assembly design method that can uniformly manage screw components, structure machine configuration, automate assembly layout, and perform visual verification, so as to improve design efficiency, accuracy, and standardization. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method, device and storage medium for designing screw combinations of twin-screw extruders, which addresses the above-mentioned deficiencies of the prior art. This method enables unified management of component libraries, structured modeling of machine configurations, automated combination layout and three-dimensional visualization verification, thereby improving the efficiency and accuracy of screw combination design, reducing human error rate, and achieving configuration standardization and traceability.

[0010] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0011] A method, apparatus, and storage medium for designing a screw assembly for a twin-screw extruder includes the following steps:

[0012] S1. Build a component library: Categorize and manage screw components and barrel components, import and parse CAD drawing files, extract the type and size parameters of each component, and save component snapshots to form a reusable component library;

[0013] S2. Establish Model Configuration Tree: Construct a multi-level configuration tree that includes series, model, barrel library, thread library, production line and configuration items. Automatically create barrel library and thread library containers for model, and automatically create barrel component container and component component container for production line.

[0014] S3. Assembly: In response to the assembly operation, select the barrel assembly and screw component from the component library and add them to the assembly area of ​​the current production line. Arrange the screw component in layers according to the upper and lower layers, and calculate the total combined length in real time.

[0015] S4. Visual verification and export: Generate CAD 3D preview based on assembly results, generate assembly drawing code, and provide print preview and vector PDF drawing export to complete screw assembly design.

[0016] Preferably, the dimensional parameters include length, diameter, and pitch; in step S1, importing and parsing the CAD drawing file includes: parsing the DWG format drawing with a first parsing engine and parsing the DXF format drawing with a second parsing engine; performing unit conversion and layer visibility processing on the drawing entities, and splitting the entire drawing into independent components according to the component boundaries, saving the current version snapshot, the original version snapshot, and the hash check value; when the main parsing link fails, it automatically falls back to the backup parsing engine for parsing.

[0017] Preferably, in step S2, the node types of the machine configuration tree include: machine type node, barrel library node, thread library node, production line node, production line barrel container node, production line screw container node, barrel configuration item node, and screw configuration item node; the configuration item node records are derived from component snapshots, valid names, types, length and diameter parameters, and support name overriding and length overriding.

[0018] Preferably, in step S3, the combined assembly further includes: responding to a reference synchronization operation, marking the assembly reference item to be synchronized when the source component or source configuration changes, and updating the assembly reference based on the latest source data to keep the configuration data consistent.

[0019] Preferably, in step S3, the combined assembly further includes: responding to a configuration copy operation by deeply copying the combined instance of the source production line into a new production line copy to reuse the existing combined scheme.

[0020] Preferably, in step S4, generating a CAD 3D preview includes: constructing a 3D scene based on CAD snapshots of each component in the assembly result, performing 3D rendering with a high-precision rendering engine, and adaptively scheduling according to the rendering load.

[0021] Preferably, the method further includes step S5, parameterized materialization of the barrel template: importing the barrel CAD source file to generate the barrel template, parsing the template parameter structure and binding it with the annotation, and generating a parameterized deformation plan; when configuring an instance, materializing the real detail graphics based on the source CAD according to the template parameter values, saving the runtime snapshot and supporting rematerialization.

[0022] Preferably, the method further includes step S6, screw wear measurement: collecting screw measurement data, normalizing the coordinates and projecting the axis of the measurement points, organizing the data according to the upper screw master curve and the lower screw master curve, combining the standard diameter reference line and the upper and lower limit reference lines to perform wear assessment, and generating a measurement report.

[0023] To address the aforementioned technical problems, the present invention also provides an apparatus for implementing the aforementioned twin-screw extruder screw combination design method, comprising:

[0024] The component library management module is used to classify and manage screw components and barrel components, import and parse CAD drawing files, extract component parameters, and save component snapshots.

[0025] The machine configuration module is used to build a multi-level configuration tree that includes series, machine type, machine barrel library, thread library, production line and configuration items, and automatically create corresponding container nodes for machine type and production line;

[0026] The assembly module is used to respond to assembly operations, select components from the component library and add them to the assembly area, arrange the screw elements in layers according to the upper and lower layers, and calculate the total assembly length in real time.

[0027] The visualization export module is used to generate CAD 3D previews based on assembly results, generate assembly drawing code, and provide print previews and vector PDF drawing exports.

[0028] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the twin-screw extruder screw assembly design method.

[0029] By adopting the above technical solution, the present invention provides a twin-screw extruder screw combination design method, device, and storage medium, which have the following beneficial effects:

[0030] (1) By managing component parameters and CAD snapshots in a unified manner through the component library, component data standardization and reuse can be achieved, reducing repetitive data entry;

[0031] (2) By using multi-level configuration tree structured modeling, the configuration of barrel, screw and production line is digitized, supporting automatic database construction and reference synchronization, and improving configuration management efficiency;

[0032] (3) By arranging the upper and lower layers in real time and calculating the total length of the combination, the screw combination arrangement is automated, reducing the human error rate;

[0033] (4) Through CAD 3D preview and vector paper export, the combined scheme can be visualized and standardized for delivery, which facilitates design confirmation and communication with customers;

[0034] (5) By combining the parameterization and materialization of the barrel template with the screw wear measurement, a complete closed loop from design to measurement and maintenance is formed, thereby improving the product quality management capability. Attached Figure Description

[0035] Figure 1 This is a flowchart of the method of the present invention;

[0036] Figure 2 This is a schematic diagram of the model configuration tree in this invention;

[0037] Figure 3 This is a schematic diagram of the layered arrangement of the screw assembly in this invention;

[0038] Figure 4 This is a schematic diagram of the process of parametric materialization of the barrel template in this invention;

[0039] Figure 5 This is a schematic diagram of the screw wear measurement and evaluation process in this invention;

[0040] Figure 6 This is a schematic diagram of the modular structure of the screw assembly design device in this invention. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] like Figure 1-6 As shown, in this embodiment, the twin-screw extruder screw assembly design method includes the following steps:

[0045] S1. Build a component library, classify and manage screw components and barrel components, import and parse CAD drawing files, extract the type and size parameters of each component and save component snapshots to form a reusable component library.

[0046] Specifically, the component library is categorized and managed by component type, including screw components and barrel components. Each component entity records: component name, component type, CAD document (JSON serialized), current version snapshot (including file extension and SHA256 checksum), original version snapshot, associated full-image source asset ID, splitting order, entity UID mapping, default rendering color, description, and sorting.

[0047] Specifically, the CAD import and parsing process employs a dual-engine strategy: the ACadSharp engine is used for DWG format, and the netDxf engine is used for DXF format. If the primary parsing link fails, it automatically falls back to the backup engine to avoid import interruption. Parsing processing includes: parsing and converting source file units to millimeters, handling layer visibility, inserting transformations to restore entity coordinates, and splitting the entire drawing into independent components based on component boundaries.

[0048] S2. Establish a machine configuration tree, construct a multi-level configuration tree that includes series, machine type, machine barrel library, thread library, production line and configuration items, automatically create machine barrel library and thread library containers for machine types, and automatically create machine barrel component containers and component component containers for production lines.

[0049] Specifically, the configuration tree is a multi-level structure, with the node types and levels as follows:

[0050] Series (Level 1) → MachineType (Level 2) → BarrelLibrary (Level 3) / ScrewLibrary (Level 3) / ProductionLine (Level 3) → ProductionLine Barrel Container (Level 4) / ProductionLine Screw Container (Level 4) → BarrelItem (Level 4) / ScrewItem (Level 4)

[0051] Specifically, when creating a new machine model, two system containers, "Barrel Library" and "Thread Library," are automatically created; when creating a new production line, two containers, "Barrel Assembly" and "Component Assembly," are automatically created. The configuration item node records parameters such as the source component name snapshot, valid name, type, length, diameter, and pitch, supporting name overriding and length overriding, as well as same-level name duplication verification.

[0052] Specifically, the configuration tree supports adding, renaming, deleting, sorting, expanding / collapsed, and multi-selecting nodes, as well as dynamically controlling operations based on user permissions. It provides reference synchronization for source changes: recording the reference items to be synchronized and updating them with one click based on the latest source data.

[0053] S3. Assembly: In response to the assembly operation, select the barrel assembly and screw component from the component library and add them to the assembly area of ​​the current production line. Arrange the screw component in layers according to the upper and lower layers, and calculate the total combined length in real time.

[0054] Specifically, select the barrel assembly and screw element from the component library / preview panel and add them to the assembly area. The ScrewAssemblyEntity records the associated production line, the actual total length after assembly, the status (Draft / Completed / Exported), the export path, the drawing code (format: equipment model_number), the total length of the barrel, the effective length of the screw, the product name, the material, the weight, etc.

[0055] Specifically, the screw elements are arranged in two layers, Top and Bottom, corresponding to the two parallel screws of a twin-screw extruder. The system calculates the total length of the combination in real time and supports the sorting and adjustment of combination items, material editing, reference synchronization and configuration copying (deep copy of the production line).

[0056] S4. Visual verification and export: Generate CAD 3D preview based on assembly results, generate assembly drawing code, and provide print preview and vector PDF drawing export to complete the screw assembly design.

[0057] Specifically, a 3D scene is constructed based on CAD snapshots of each component in the assembly result, and 3D rendering is performed using the HelixToolkit high-precision rendering engine. Adaptive scheduling (background warm-up and load sampling) is also performed based on the rendering load.

[0058] Drawings are exported using a vector PDF solution: drawn directly using PdfSharp, with built-in Chinese fonts and a logo, supporting both long and paginated layouts. Drawings include elements such as a title block, logo, vertical screw labels, barrel / thread statistics table, and dimension annotations.

[0059] S5, Parametric materialization of barrel template (optional)

[0060] Specifically, the process imports the barrel CAD source file to generate a barrel template, parses the template category, parameter structure, annotation binding and sketch definition, and generates a parametric transformation plan (TransformPlan). When configuring an instance, the parameters and transformation plan are copied to a runtime snapshot, and realistic detailed graphics are materialized based on the source CAD. The runtime status and failure diagnosis are recorded, and rematerialization is supported, achieving "one template, multiple specifications".

[0061] S6. Screw Wear Measurement and Evaluation (Optional)

[0062] Specifically, it supports three types of sessions: real-time, import, and history; it acquires measurement data via Bluetooth BLE or file import; it performs coordinate normalization and axis projection on measurement points, and organizes data according to the upper / lower screw master curves; it performs wear assessment by combining standard diameter and upper and lower limit reference lines, and generates a professional measurement report containing assembly snapshots and curves.

[0063] Specifically, the twin-screw extruder screw assembly design device includes: a component library management module, used to classify and manage screw assemblies and barrel assemblies, import and parse CAD drawing files, extract component parameters, and save component snapshots; a machine configuration module, used to construct a multi-level configuration tree containing series, machine models, barrel libraries, screw libraries, production lines, and configuration items, and automatically create corresponding container nodes for machine models and production lines; an assembly module, used to respond to assembly operations, select components from the component library to add to the assembly area, arrange screw components in upper and lower layers, and calculate the total assembly length in real time; and a visualization export module, used to generate a CAD 3D preview based on the assembly results, generate assembly drawing code, and provide print preview and vector PDF drawing export.

[0064] Understandably, this invention is rationally designed and uniquely constructed. It uses a "component library + configuration tree + assembly + visual export" framework as its main thread to build a complete digital process for the design of twin-screw extruder screw combinations. Optionally, it combines parametric materialization of the barrel template with screw wear measurement to form a closed loop from design to maintenance. It also has the following advantages:

[0065] (1) Standardize and reuse component data to reduce repetitive data entry and improve design efficiency;

[0066] (2) Configure structured modeling and automatic database creation, and synchronize references to reduce manual maintenance and data inconsistencies;

[0067] (3) The total length of the upper and lower layers is calculated in real time to reduce the error rate of manual layout;

[0068] (4) 3D visualization and vector paper export facilitate design verification and standardized delivery;

[0069] (5) Combining template parameterization and wear measurement, a complete closed loop from design to maintenance is formed.

[0070] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A method for designing a screw assembly for a twin-screw extruder, characterized in that: Includes the following steps: S1. Build a component library: Categorize and manage screw components and barrel components, import and parse CAD drawing files, extract the type and size parameters of each component, and save component snapshots to form a reusable component library; S2. Establish Model Configuration Tree: Construct a multi-level configuration tree that includes series, model, barrel library, thread library, production line and configuration items. Automatically create barrel library and thread library containers for model, and automatically create barrel component container and component component container for production line. S3. Assembly: In response to the assembly operation, select the barrel assembly and screw component from the component library and add them to the assembly area of ​​the current production line. Arrange the screw component in layers according to the upper and lower layers, and calculate the total combined length in real time. S4. Visual verification and export: Generate CAD 3D preview based on assembly results, generate assembly drawing code, and provide print preview and vector PDF drawing export to complete screw assembly design.

2. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: The dimensional parameters include length, diameter, and pitch; In step S1, importing and parsing CAD drawing files includes: parsing DWG format drawings with a first parsing engine and parsing DXF format drawings with a second parsing engine. Perform unit conversion and layer visibility processing on the drawing entities, and split the entire drawing into independent components according to the component boundaries, saving the current version snapshot, the original version snapshot, and the hash check value; when the main parsing link fails, it automatically falls back to the backup parsing engine.

3. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: In step S2, the node types of the machine configuration tree include: machine type node, barrel library node, thread library node, production line node, production line barrel container node, production line screw container node, barrel configuration item node, and screw configuration item node; the configuration item node records are derived from component snapshots, valid names, types, length and diameter parameters, and support name overriding and length overriding.

4. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: In step S3, the combined assembly further includes: responding to a reference synchronization operation, marking the assembly reference item to be synchronized when the source component or source configuration changes, and updating the assembly reference based on the latest source data to keep the configuration data consistent.

5. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: In step S3, the combined assembly further includes: responding to a configuration copy operation by deep copying the combined instance of the source production line into a new production line copy to reuse the existing combined scheme.

6. The twin-screw extruder screw combination design method according to claim 1, characterized in that: In step S4, generating a CAD 3D preview includes: constructing a 3D scene based on CAD snapshots of each component in the assembly result, performing 3D rendering with a high-precision rendering engine, and adaptively scheduling according to the rendering load.

7. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: It also includes step S5, parameterization and materialization of the barrel template: import the barrel CAD source file to generate the barrel template, parse the template parameter structure and bind it with the annotation, and generate a parameterized deformation plan; When configuring an instance, realistic detailed graphics are materialized based on the source CAD based on the template parameter values, a runtime snapshot is saved, and rematerialization is supported.

8. The twin-screw extruder screw assembly design method according to claim 1, characterized in that: It also includes step S6, screw wear measurement: collect screw measurement data, normalize the coordinates and project the axis of the measurement points, organize the data according to the upper screw master curve and the lower screw master curve, combine the standard diameter reference line and the upper and lower limit reference lines to perform wear assessment, and generate a measurement report.

9. An apparatus for implementing the twin-screw extruder screw combination design method according to any one of claims 1-8, characterized in that: include: The component library management module is used to classify and manage screw components and barrel components, import and parse CAD drawing files, extract component parameters, and save component snapshots. The machine configuration module is used to build a multi-level configuration tree that includes series, machine type, machine barrel library, thread library, production line and configuration items, and automatically create corresponding container nodes for machine type and production line; The assembly module is used to respond to assembly operations, select components from the component library and add them to the assembly area, arrange the screw elements in layers according to the upper and lower layers, and calculate the total assembly length in real time. The visualization export module is used to generate CAD 3D previews based on assembly results, generate assembly drawing code, and provide print previews and vector PDF drawing exports.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the twin-screw extruder screw combination design method as described in any one of claims 1-8.

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