Hydraulic oil cylinder design method and system and hydraulic oil cylinder

Abstract

The invention discloses a hydraulic oil cylinder design method and system and a hydraulic oil cylinder. The method comprises the steps that basic data of a to-be-designed hydraulic oil cylinder are determined; carrying out reusability analysis on the basic data of the hydraulic oil cylinder to be designed, and generating a processing list with a state mark; carrying out part processing and sealing element assembling according to the processing list with the state marks to obtain a derived model; parameterized driving and model regeneration are conducted on the derived model through basic data of the hydraulic oil cylinder to be designed, and a designed hydraulic oil cylinder model and an engineering drawing are obtained. According to the method, reference model reusing, part library retrieval, parameterization derivation and automatic assembly are fused, the problems that pure parameterization design has no reusing function and the pure reusing efficiency is low are solved, and part-level efficient design is achieved.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinder technology, specifically relating to a hydraulic cylinder design method, system, and hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are core actuators in construction machinery, and their design efficiency directly impacts the overall machine delivery cycle. Currently, there are two main design approaches for hydraulic cylinders, but both have significant drawbacks and fail to meet the design requirements of "high efficiency + high quality": Pure parametric design mode: A complete parametric template is developed for each hydraulic cylinder. After inputting parameters (such as inner diameter and stroke), the whole machine model is automatically generated. However, this mode does not consider component reuse. All components are newly generated, resulting in the redesign of historically mature components (such as standard cylinder bottoms), and low design efficiency (generating a single hydraulic cylinder takes 4-6 hours). Pure reuse design pattern: Designers manually retrieve similar parts from the parts library and assemble them one by one into a hydraulic cylinder. However, this pattern lacks parametric supplementation, and when there are no matching parts in the library, it is necessary to remodel. Moreover, the retrieval relies solely on the file name and lacks precise positioning based on "category nodes + attributes," resulting in low retrieval efficiency (a single part retrieval takes 20-30 minutes).

[0003] With the increasing demand for "multiple models and rapid iterations" of hydraulic cylinders (such as high-altitude and mining cylinders), the traditional model is no longer suitable and there is an urgent need to solve the pain points of "low efficiency and repetitive work" in the traditional model. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a hydraulic cylinder design method, system, and hydraulic cylinder that integrates "reference model reuse, parts library retrieval, parametric derivation, and automatic assembly," solving the problems of low reuse efficiency in pure parametric design and achieving efficient component-level design.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, a hydraulic cylinder design method is provided, comprising: determining the basic data of the hydraulic cylinder to be designed; performing reusability analysis on the basic data of the hydraulic cylinder to be designed and generating a processing list with status markers; processing parts and assembling seals according to the processing list with status markers to obtain a derived model; and parametrically driving and regenerating the derived model using the basic data of the hydraulic cylinder to be designed to obtain a designed hydraulic cylinder model and engineering drawings.

[0006] Reference model: A mature historical hydraulic cylinder model, including standardized components such as cylinder body and cylinder rod, serves as the basic data source for reuse analysis.

[0007] Furthermore, a reusability analysis is performed on the basic data of the hydraulic cylinder to be designed, and a processing list with status markers is generated. This includes: performing a reusability analysis based on a reference model and a reusability analysis based on a parts library based on the basic data of the hydraulic cylinder to be designed; and generating a processing list with status markers by comparing the parameters of the hydraulic cylinder to be designed with those of the reference model.

[0008] Component Library: A standardized component library within the product design platform, storing parametric models of cylinder blocks, cylinder rods, etc., and supporting "category node + attribute" retrieval. Category attribute retrieval combines the model's built-in "category nodes" (e.g., "cylinder block") with "category attributes" (e.g., inner diameter). (mm, material), accurately locate similar parts in the parts library. Classification node + parameter retrieval: This refers to the precise retrieval logic performed by the CREO tool on "y" type parts—first reading the built-in "classification node" parameters of the part (such as "hydraulic cylinder - cylinder barrel - material"), then extracting the "classification attributes" (such as inner diameter) from the target parameters. mm, length (mm), based on the combination of the two, the parts library is searched for parts with completely matching parameters, thereby improving the accuracy and efficiency of the search.

[0009] Furthermore, the reusability analysis based on the reference model includes: after downloading and opening the reference model model on the tool, the parameters of all components in the model are extracted and compared one by one with the basic data of the hydraulic cylinder to be designed: components with completely identical parameters are marked as "n", where n means no derivation is needed and they can be reused directly; components with inconsistent parameters are marked as "y", where y means derivation processing is required; if there is at least one component of type "y" under a component, then the component is marked as "y"; if all sub-components of the component are of type "n", then they are marked as "0", where 0 means that they cannot be analyzed and are directly retained.

[0010] Furthermore, the reusability analysis based on the parts library includes: for a part marked "y", first read the "classification node" parameter built into the part, then extract the attribute value corresponding to the classification node from the basic data of the hydraulic cylinder to be designed, and perform a search in the parts library based on "classification node + attribute value": when a part with completely matching parameters is found, it is marked as "x", where x indicates that it is to be replaced and reused; if no matching part is found, the "y" mark is retained; for a component marked "0", the same logic is used to perform sub-component deduplication, and if the overall parameters of the component completely match a component in the parts library, it is marked as "x".

[0011] Category Nodes: Category identifiers for components in the product design platform (e.g., "Cylinder Block - Material - Diameter") mm”, which is embedded in the model as a parameter for precise retrieval.

[0012] Furthermore, the parts are processed and the seals are assembled according to the processing list with status markers, including: replacing reusable parts, deriving parts that need to be processed, selecting seals, and automatically assembling them according to the coordinate system.

[0013] Furthermore, the derived model is parametrically driven and regenerated using the basic data of the hydraulic cylinder to be designed. This includes: parametric driving, which involves inputting the basic data of the hydraulic cylinder to be designed into the derived model through a customized interface to associate parametric features within the model and update the model dimensions and annotations of the two-dimensional engineering drawings in real time without manual adjustment; after the parametric driving is completed, a "regeneration refresh" operation is performed to complete the model regeneration and error handling.

[0014] Parametric-driven: This refers to the process of inputting the target parameters of the hydraulic cylinder (such as cylinder inner diameter and cylinder stroke) issued by the product design platform into the derived component model through a customized interface. The system automatically associates the parametric features within the model and updates the 3D model dimensions and 2D engineering annotations (including dimensional values ​​and tolerances) in real time without the need for manual adjustment.

[0015] Furthermore, it also includes: after obtaining the designed hydraulic cylinder model and engineering drawings, extracting the key information of the components to be derived and marking them as temporary status. After the release process is completed, the model and drawings are converted to formal status (data conversion) and archived.

[0016] Data formalization: refers to the compliant archiving process of design data from "temporary" to "formal" - the "y" type component information extracted by the CREO tool is first sent to the product design platform and marked as "temporary" (unsearchable and only for internal review); after the product design platform completes the release process, the model and engineering drawings are pushed to the PDM system simultaneously, the data status is changed to "formal", and search and production use permissions are opened, which complies with data management specifications.

[0017] Furthermore, it also includes: based on the assembly file name of the designed hydraulic cylinder model and engineering drawing, obtaining and locating the target component and the corresponding engineering drawing from the PDM system, automatically identifying the importance of dimension markings, and obtaining feedback results.

[0018] Secondly, a hydraulic cylinder design system is provided, comprising: a product design platform for executing the hydraulic cylinder design method described in the first aspect; a CREO tool for supporting the invocation of the product design platform, downloading and opening a reference model from a PDM system based on the basic data of the hydraulic cylinder to be designed issued by the product design platform; and a PDM system for storing historical models of hydraulic cylinders and corresponding design data, and supporting the CREO tool for invoking historical models and uploading final design results.

[0019] The product design platform provides the system with functions for configuring hydraulic cylinder design parameters, selecting key components, matching reference models, and managing data archives. It is the core source of multiple data inputs.

[0020] PDM system: Used to store design data such as 3D models and 2D engineering drawings of hydraulic cylinders, and supports the use of the CREO tool to call up historical models and upload final design results.

[0021] Thirdly, a hydraulic cylinder is provided, which is designed based on the hydraulic cylinder design method described in the first aspect.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) This invention performs reusability analysis on the basic data of the hydraulic cylinder to be designed and generates a processing list with status markers; processes the parts and assembles the seals according to the processing list with status markers to obtain a derived model; parametrically drives and regenerates the derived model using the basic data of the hydraulic cylinder to be designed to obtain the designed hydraulic cylinder model and engineering drawings; integrates "reference model reuse, parts library retrieval, parametric derivation (based on the exclusive parametric template of the parts, such as the cylinder template, inputting target parameters, such as inner diameter, length, etc., to automatically generate a new model) and automatic assembly (based on the preset coordinate system, such as the coaxial coordinate system of the cylinder body and the cylinder rod, to automatically assemble the reused / derived parts)," solves the problem of no reuse function and low efficiency of pure parametric design, and realizes efficient design at the component level; improves the design efficiency and component reuse rate of hydraulic cylinders, and reduces repetitive modeling labor; (2) This invention reduces human error and improves design quality and sealing assembly reliability; (3) This invention accelerates the entire process of hydraulic cylinder design and manufacturing, and reduces R&D and production costs; (4) This invention ensures the compliance of design data and facilitates subsequent data traceability and management. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main process of a hydraulic cylinder design method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the main process of reusability analysis based on a reference model in an embodiment of the present invention; Figure 3 This is a schematic diagram of the main process of reusability analysis based on the component library in this embodiment of the invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0025] Example 1 A hydraulic cylinder design method includes: determining the basic data of the hydraulic cylinder to be designed; performing reusability analysis on the basic data of the hydraulic cylinder to be designed and generating a processing list with status markers; processing parts and assembling seals according to the processing list with status markers to obtain a derived model; and parametrically driving and regenerating the derived model using the basic data of the hydraulic cylinder to be designed to obtain a designed hydraulic cylinder model and engineering drawings.

[0026] like Figure 1 As shown, this invention uses "product design platform - PDM system - CREO tool terminal" as the core data link and "secondary reuse analysis" as the core logic to construct a fully automated design scheme of "data preparation → secondary reuse analysis → component processing and automatic assembly → dedicated processing of seals → model verification and archiving" (dedicated processing of seals refers to the independent process designed for hydraulic cylinder seals, such as O-rings and dust seals. Seals do not participate in the reuse / derivation of regular parts. They are selected separately through the product design platform and automatically assembled by the CREO tool terminal according to the issued "receiving coordinate system". During derivation, the "skip / delete old and install new / delete old parts" operation is performed according to the consistency of the new and old seal file names to ensure that the seal specifications and assembly accuracy meet the requirements). The main process of the hydraulic cylinder design method is as follows.

[0027] Step S1, Data Preparation: Determine the basic data of the hydraulic cylinder to be designed.

[0028] On the product design platform's activity page, select the key components of the hydraulic cylinder, match historical reference models, obtain the corresponding 3D model files, and determine the basic data of the hydraulic cylinder to be designed.

[0029] Step S2, Reusability Analysis and Inventory Generation: Perform reusability analysis on the basic data of the hydraulic cylinder to be designed, and generate a processing inventory with status markers.

[0030] The CREO tool launches Creo and obtains platform parameters (basic data of the hydraulic cylinder to be designed provided by the product design platform), opens the reference model, marks the status of parts / components by comparing parameters, searches the parts library to find matching replacement parts, and generates a processing list with status markings.

[0031] In this invention, reusability analysis is a two-level reusability analysis. As the core link in the automatic model generation, the two-level reusability analysis is performed in two steps: "reusability analysis based on reference model" and "reusability analysis based on parts library" to ensure accurate identification and marking of reusable parts.

[0032] Open the reference model model in the CREO tool, first compare the reference model with the target parameters to mark the status of the parts / components (no derivation required, derivation required, unable to analyze), then search the parts library for the parts that need to be derived to match the replaceable parts, and generate a processing list with status markings.

[0033] Reusability analysis based on the reference model: After downloading and opening the reference model model from the PDM system, the CREO tool first extracts the parameters of all components within the model (such as cylinder inner diameter and cylinder rod diameter), and compares them one by one with the target parameters (basic data of the hydraulic cylinder to be designed) issued by the product design platform. Components with completely identical parameters are marked as "n" (no derivation required, directly reused), and components with inconsistent parameters are marked as "y" (derivation processing required). If there is at least one component of type "y" under a component, the component is marked as "y". If all sub-components of the component are of type "n", they are marked as "0" (cannot be analyzed, directly retained). An example of marking is shown below. Figure 2 As shown.

[0034] Reusability analysis based on the component library: For the component marked "y", first read the built-in "category node" parameters (such as "hydraulic cylinder - cylinder barrel - material") of the component, and then extract the attribute values ​​corresponding to the category node (such as cylinder barrel inner diameter) from the parameter list issued by the product design platform. mm, length (mm) The system performs a search in the parts library based on "category node + attribute value". When a part is found that perfectly matches the parameters, it is marked as "x" (to be replaced and reused, specifying the target part name, such as a→x, b); if no matching part is found, it is marked as "y" (for subsequent derivation). For components marked as "0", the same logic is used to check for duplicate sub-components. If the overall parameters of the component completely match a component in the parts library, it is marked as "x". An example of marking is shown below. Figure 3 As shown.

[0035] Level 2 reusability analysis accurately identifies reusable components using "y / n / x / 0" status markers. Combined with parametric-driven processing, it automatically updates dimensions and annotations. Automatic assembly ensures precise component (including seals) positioning. This collaborative approach avoids redundant modeling, parameter transfer errors, and assembly misalignment, providing core technical support for rapid hydraulic cylinder design. It demonstrates significant technological innovation and synergy by integrating component classification rules, parameter matching requirements, and assembly process specifications. Level 2 reusability analysis provides a two-step decision logic: "Based on reference model parameter matching marked 'n' (direct reuse), parameter inconsistency marked 'y' (requires derivation), and all sub-components matching marked '0' (cannot be analyzed) → Based on component library 'classification node + parameter' 'retrieval of matching parts marked 'x' (replacement and reuse)." By clearly defining the subsequent processing method for components through status markers, it significantly improves component reuse rates, reduces repetitive modeling work, and serves as a foundational technology for process integration.

[0036] Step S3, Component Processing and Seal Assembly: Process components and assemble seals according to the processing list with status markers to obtain the derived model.

[0037] Perform the following operations according to the list: replace reusable parts (reusable parts are obtained from PDM and then replaced for assembly), derive parts that need to be processed (parts that need to be derived are simultaneously derived from 3D models and 2D engineering drawings, while parts that do not need to be derived are directly retained), and select seals separately on the product design platform. The CREO tool automatically assembles the parts according to the coordinate system information provided by the product design platform. When deriving, old seals are processed according to the rules (skip, replace, or delete operations are performed based on the consistency of the seal file name).

[0038] By inputting the target parameters (such as cylinder inner diameter and stroke) of the product design platform into the derived component model through a customized interface, the automatic linkage update of the 3D model dimensions and 2D engineering icon annotations is realized. Simultaneously, model regeneration and error handling (automatic repair of minor errors and location of major errors) are performed to ensure that the design results are completely matched with the target parameters. This is the core data transfer link connecting reusable analysis and automatic assembly.

[0039] For conventional components, "removing the old and installing the new" or reusing the assembly is performed based on a preset assembly coordinate system (such as the coaxial coordinate system of the cylinder block and cylinder rod); for seals, automatic assembly is performed according to a dedicated process of "platform selection → receiving coordinate system positioning", ensuring that the assembly accuracy meets the process specifications. This is a key technology to ensure the manufacturability of the design results.

[0040] Step S4, Parametric Driving and Model Regeneration: The derived model is parametrically driven and regenerated using the basic data of the hydraulic cylinder to be designed, resulting in the designed hydraulic cylinder model and engineering drawings.

[0041] Input the target parameters (basic data of the hydraulic cylinder to be designed) provided by the product design platform into the derived model to update the dimensions and annotations, refresh the model and drawings and fix minor errors, and output the final usable model and engineering drawings.

[0042] Parametric-driven and model regeneration enable the updating of derived component dimensions and the verification of model compliance, ensuring that the design results meet the target requirements.

[0043] Parametric-driven: This involves applying target parameters (such as cylinder wall thickness) issued by the product design platform. mm, cylinder stroke The model (e.g., cylinder block, cylinder rod) is input into the derived component model via a customized interface. The system automatically associates the parametric features (e.g., cylinder inner diameter, length) within the model and updates the model dimensions and the annotations (e.g., dimension values, tolerances) of the 2D engineering drawing in real time, without the need for manual adjustment.

[0044] Model Rebirth and Error Handling: After parametric driving is completed, the CREO tool automatically performs a "rebirth refresh" operation on the model and engineering drawings to check for problems such as feature failure (e.g., errors in stretching features caused by dimensional conflicts) and assembly interference (e.g., abnormal clearance between cylinder rod and seal). For minor errors (e.g., offset annotation positions), the system automatically repairs them; for major errors (e.g., feature parameters out of range), a prompt appears and the faulty component is located, facilitating quick troubleshooting by designers.

[0045] Step S5: Data archiving.

[0046] Extract key information of the derived components and send it to the product design platform, marking it as temporary. After the product design platform completes the release process, push the model and drawings to PDM to be archived in the formal state.

[0047] Step S6: Model importance extraction.

[0048] Based on the assembly file name (the assembly file name of the designed hydraulic cylinder model and engineering drawing) issued by the product design platform, the target component and the corresponding engineering drawing are obtained and located from the PDM system, the importance of the dimension markings is automatically identified, and the results are fed back to the product design platform.

[0049] CREO tool-side secondary development implementation logic: Through customized development, it connects with the product design platform and PDM system to support full-process automation of the solution, involving the following key technical points: (1) Multi-system interface development: Develop a data receiving interface for the product design platform to enable real-time acquisition of target parameters and reference model file names by the CREO tool; develop a PDM model interaction interface to support the download of reference model models and the uploading of final design results.

[0050] (2) Component status marking and processing: By traversing all components of the reference model through the function, a filtering function is defined to filter the components whose parameters need to be compared, and then the action function is used to mark "n / y / 0" according to the "parameters consistent / inconsistent" rule; for "x" type components, the function is called to execute "delete old and install new" to ensure that the assembly constraints are compliant after replacement.

[0051] Typical processing scenario example: (1) Reusable component replacement scenario: When a cylinder bottom component a is marked as "y" due to inconsistent parameters, after the matching component b (with completely consistent parameters) is found in the component library, the CREO tool downloads b from the PDM system, deletes a based on the "cylinder bottom assembly coordinate system", and automatically completes the positioning and assembly of b. (2) Scenario requiring derived component processing: When a certain reinforcing rib component a2 is marked as "y" and there is no matching component in the library, the CREO tool calls the dedicated parameterized template for the reinforcing rib and inputs the target parameters (thickness). mm, length (mm), automatically generate a 3D model and engineering drawings, and then directly assemble them into the hydraulic cylinder assembly.

[0052] Example 2 Based on the hydraulic cylinder design method described in Embodiment 1, this embodiment provides a hydraulic cylinder design system, including: a product design platform for executing the hydraulic cylinder design method described in Embodiment 1; a CREO tool for supporting the invocation of the product design platform, downloading and opening a reference model model from the PDM system based on the basic data of the hydraulic cylinder to be designed issued by the product design platform; and a PDM system for storing historical models of hydraulic cylinders and corresponding design data, and supporting the CREO tool for invoking historical models and uploading final design results.

[0053] Example 3 Based on the hydraulic cylinder design method described in Embodiment 1, this embodiment provides a hydraulic cylinder designed based on the hydraulic cylinder design method described in Embodiment 1.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hydraulic cylinder design method, characterized in that, include: Determine the basic data of the hydraulic cylinder to be designed; Perform reusable analysis on the basic data of the hydraulic cylinder to be designed, and generate a processing list with status markers; The derived model is obtained by processing the parts and assembling the seals according to the processing list with status markers; By using the basic data of the hydraulic cylinder to be designed, the derived model is parametrically driven and regenerated to obtain the designed hydraulic cylinder model and engineering drawings.

2. The hydraulic cylinder design method according to claim 1, characterized in that, Perform reusable analysis on the basic data of the hydraulic cylinder to be designed, and generate a status-marked processing list, including: Based on the basic data of the hydraulic cylinder to be designed, reusability analysis based on the reference model and reusability analysis based on the parts library are performed. By comparing the parameters of the hydraulic cylinder to be designed with the reference model, a processing list with status markers is generated.

3. The hydraulic cylinder design method according to claim 2, characterized in that, Reusability analysis based on the reference model includes: After downloading and opening the reference model on the tool, first extract the parameters of all components in the model and compare them one by one with the basic data of the hydraulic cylinder to be designed: components with completely identical parameters are marked as "n", where n means no derivation is needed and they can be reused directly; components with inconsistent parameters are marked as "y", where y means derivation processing is required; if there is at least one component of type "y" under a component, then the component is marked as "y"; if all sub-components of the component are of type "n", then it is marked as "0", where 0 means it cannot be analyzed and is directly retained.

4. The hydraulic cylinder design method according to claim 3, characterized in that, Reusability analysis based on the parts library includes: For components marked "y", the built-in "classification node" parameter of the component is read first, and then the attribute value corresponding to the classification node is extracted from the basic data of the hydraulic cylinder to be designed. Based on "classification node + attribute value", a search is performed in the parts library: when a component with completely matching parameters is found, it is marked as "x", where x indicates that it should be replaced and reused; if no matching component is found, the "y" mark is retained; for components marked "0", the same logic is used to perform sub-component deduplication. If the overall parameters of the component completely match a component in the parts library, it is marked as "x".

5. The hydraulic cylinder design method according to claim 1, characterized in that, Component processing and seal assembly are performed according to the processing list with status markers, including: replacing reusable parts, deriving parts that need to be processed, selecting seals, and automatically assembling them according to the coordinate system.

6. The hydraulic cylinder design method according to claim 1, characterized in that, The derived model is parametrically driven and regenerated using the basic data of the hydraulic cylinder to be designed, including: Parametric driving involves inputting the basic data of the hydraulic cylinder to be designed into the derived model through a customized interface. This is used to associate parametric features within the model and update the model dimensions and annotations of the 2D engineering drawings in real time, without the need for manual adjustments. After parametric driving is completed, a "rebirth refresh" operation is performed to complete model rebirth and error handling.

7. The hydraulic cylinder design method according to claim 1, characterized in that, Also includes: After obtaining the designed hydraulic cylinder model and engineering drawings, extract the key information of the components to be derived and mark them as temporary. After the release process is completed, convert the model and drawings to the formal state and archive them.

8. The hydraulic cylinder design method according to claim 1, characterized in that, Also includes: Based on the assembly file name of the designed hydraulic cylinder model and engineering drawing, the target component and corresponding engineering drawing are obtained and located from the PDM system, the importance of the dimension markings is automatically identified, and feedback results are obtained.

9. A hydraulic cylinder design system, characterized in that, include: Product design platform for implementing the hydraulic cylinder design method according to any one of claims 1 to 8; The CREO tool is used to support the invocation of the product design platform. Based on the basic data of the hydraulic cylinder to be designed issued by the product design platform, it downloads and opens the reference model from the PDM system. The PDM system is used to store historical models of hydraulic cylinders and corresponding design data, and supports the use of the CREO tool to call up historical models and upload final design results.

10. A hydraulic cylinder, characterized in that, The hydraulic cylinder is designed based on the hydraulic cylinder design method according to any one of claims 1 to 8.

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