A method for automatically generating a blanking drawing of a non-standard plate of a hydraulic support

Abstract

This invention provides a method for automatically generating blanking drawings for non-standard hydraulic support plates. The method involves establishing a process expansion rule library for the outer and inner contours of the non-standard part in 3D software; loading a product component model into the 3D software; projecting the target part from the product component model to form a blanking drawing sketch; identifying the outer and inner contour features of the target part from the blanking drawing sketch; determining the assembly relationship between the outer contour edge of the target part and surrounding parts; calling the corresponding outer contour process expansion rule from the process expansion rule library to offset the outer contour edge; determining the geometric features of the inner contour edge of the target part; calling the corresponding inner contour process expansion rule from the process expansion rule library to offset the inner contour edge; and generating the blanking drawing of the target part based on the offset blanking drawing sketch. This method has the advantages of automatically generating blanking drawings by comprehensively planning based on 3D model features, assembly relationship analysis, and process expansion rules, thereby improving efficiency and reducing costs.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing technology for hydraulic supports, and more specifically, to a method for automatically generating cutting diagrams for non-standard plates used in hydraulic supports. Background Technology

[0002] The hydraulic support structure is mainly a medium-thick plate box-type welded structure, with a high degree of product customization and complex manufacturing process. The plate-shaped parts that make up the structure are made by hot cutting of steel plates. The cutting contours of the parts are not only complex in shape, but also have internal contours composed of various holes. The overall standardization is low, which poses a great challenge to the preparation of technical data for the cutting drawings.

[0003] Currently, non-standard sheet metal blanking drawings are mainly drawn manually. Based on traditional 2D CAD software, the theoretical outer and inner contours of the parts are drawn. Then, based on the theoretical contours and process allowance standards, the contours that need to be allowed are offset and allowed, and finally the blanking drawings for production are formed.

[0004] In summary, the existing methods for processing non-standard sheet metal blanking drawings have the following three main drawbacks: 1. They require a large investment of human resources, resulting in high labor costs; 2. Manual drawing of blanking drawings is inefficient and cannot adapt to the small-batch, short-cycle production mode of hydraulic supports; 3. The quality of blanking drawings is greatly affected by human experience and skills, making it difficult to maintain stable quality management.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a method for automatically generating cutting drawings for non-standard hydraulic support plates. This method is based on the overall planning of three-dimensional model features, assembly relationship analysis, and process scaling rules to achieve automatic generation of cutting drawings, thereby improving labor efficiency and reducing costs.

[0007] To achieve the above objectives, the technical solution adopted by this invention is: a method for automatically generating blanking drawings for non-standard hydraulic support plates, comprising the following steps: Establish process scaling rule libraries for non-standard parts based on their outer and inner contours in 3D software; Load the product component model into the 3D software, project the target part from the product component model to form a blanking sketch, and identify the outer and inner contour features of the target part from the blanking sketch; Determine the assembly relationship between the outer contour edge of the target part and the surrounding parts, and call the corresponding outer contour process expansion rule from the process expansion rule library to offset the outer contour edge; Determine the geometric features of the inner contour edge of the target part, and call the corresponding inner contour process expansion rule from the process expansion rule library to offset the inner contour edge; The blanking drawing of the target part is generated based on the blanking sketch completed by offset.

[0008] This invention establishes a process expansion rule library for the outer and inner contours of non-standard parts. Then, it uses a product component model to obtain a blanking sketch of the target part and identifies the outer and inner contour features. Further, based on different methods set for the outer and inner contours, it obtains corresponding offset rules from the process expansion rule library to offset the outer and inner contours of the target part. Finally, it generates the blanking drawing of the target part based on the blanking sketch completed by the offset. This method eliminates the process of manually drawing blanking drawings, saves labor costs, and significantly improves the generation efficiency of blanking drawings for a single non-standard part, which is highly compatible with the small-batch, short-cycle production mode of hydraulic supports.

[0009] Based on the above, the process scaling rule library includes an outer contour process scaling rule library and an inner contour process scaling rule library. The outer contour process scaling rule library is established through the following steps: First, the assembly relationship between the outer contour of the target part and the surrounding adjacent parts is classified into no assembly, plate surface assembly, and plate thickness assembly. Second, based on the assembly relationship type, establish specific numerical values ​​for the process expansion of the corresponding target part's outer contour, forming a rule library for the process expansion of the outer contour. Finally, the outer contour process scaling rule library is configured in the 3D software.

[0010] This is because the main function of the outer contour of the target part is to be assembled with other surrounding parts, and the types of assembly are limited. Therefore, by summarizing the various assembly types, a rule library for the process scale-up of the outer contour can be formed.

[0011] Based on the above, the inner contour process scaling rule library is established through the following steps: Analyze the roughness of the inner contour of the target part, and then establish specific values ​​for the process expansion of the inner contour of different product parts based on the roughness level, forming a rule library for the process expansion of the inner contour. Finally, the inner contour process scaling rule library is configured in the 3D software.

[0012] This is because the internal contour process is often related to machining, and the roughness grade is directly related to the degree of machining of the target part. Therefore, it is reasonable to use the roughness grade as the basis for the inner contour process allowance value.

[0013] Based on the above, after loading the product component model into the 3D software, the target part is identified according to its name, and the target part is projected to form a blanking sketch. This method is simple and efficient, but it requires strict adherence to naming rules for the parts.

[0014] Based on the above, the assembly relationship between the outer contour edge of the target part and the surrounding parts is determined according to the geometric topological relationship of the 3D model. That is, the assembly relationship is calculated based on the geometric dimensions of each part.

[0015] Based on the above, after generating the blanking drawing of the target part from the blanking drawing sketch completed by offset, the blanking drawing is checked into the PLM system, and the PLM system manages the blanking drawing.

[0016] Based on the above, the 3D software is CAD software.

[0017] This invention has outstanding substantive features and significant progress compared to existing technologies. Specifically, this invention automatically generates blanking drawings for non-standard parts based on 3D model features, assembly relationship analysis, and process scaling rule library, eliminating the need for manual drawing of blanking drawings and saving a significant amount of labor costs. Moreover, the generation efficiency of blanking drawings for a single non-standard part is increased by more than 80%, and it can well adapt to the small-batch, short-cycle production mode of hydraulic supports. By standardizing and automating human experience and skills, the generation quality of blanking drawings is stabilized. Attached Figure Description

[0018] Figure 1 This is a flowchart of the method for automatically generating cutting diagrams for non-standard hydraulic support plates in this invention.

[0019] Figure 2 This is a geometric relationship diagram between the target part and its surrounding adjacent parts in a typical box-shaped structure of the hydraulic support product of this invention.

[0020] Figure 3 This is a schematic diagram of the outer and inner contours of the target part in this invention.

[0021] Figure 4 This is a schematic diagram of the assembly relationship between the outer contour of the target part and the adjacent surrounding parts in this invention. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0023] like Figure 1 As shown, a method for automatically generating blanking drawings for non-standard hydraulic support plates includes the following steps: In this embodiment, a process scaling rule library based on the outer and inner contours of non-standard parts is established in the 3D software. The 3D software used is CAD software.

[0024] Specifically, in this embodiment, the process scaling rule library includes an outer contour process scaling rule library and an inner contour process scaling rule library. The outer contour process scaling rule library is established through the following steps: like Figures 2-4 As shown, the assembly relationship between the outer contour of the target part and its adjacent parts is first classified into three categories: no assembly (the outer contour of the target part has no adjacent surrounding parts), plate surface assembly (the outer contour of the target part is in contact with the plate surface of the adjacent surrounding parts), and plate thickness assembly (the outer contour of the target part is in contact with the plate thickness surface of the adjacent surrounding parts). Then, based on the assembly relationship type, specific values ​​for the process expansion of the outer contour of the corresponding product part are established to form a rule library for the process expansion of the outer contour, which is then configured in the 3D CAD software.

[0025] Table 1. Rule Library for Process Quantity Increase of Non-standard Parts' Outer Contours

[0026] Establish an inner contour process expansion rule library: Analyze the roughness identifier of the inner contour of the target part of the product, and then establish specific values ​​for the process expansion of the inner contour of different product parts according to the roughness level, forming an inner contour process expansion rule library, and configure it in 3D CAD software.

[0027] Table 2. Rules for Proportioning Processes of Non-standard Parts' Inner Contours

[0028] In this embodiment, the target part is identified and projected from the product component model in the 3D software to form a blanking sketch. In this embodiment, the target part is identified by its name and then projected. The outer and inner contour features of the target part are then identified from the blanking sketch.

[0029] In this embodiment, the assembly relationship between the outer contour edge of the target part and the surrounding parts is determined based on the geometric topological relationship of the three-dimensional model. The assembly relationship is divided into three categories: no assembly relationship, plate surface assembly relationship, and plate thickness assembly relationship. The assembly relationship between the outer contour of the product part and the surrounding adjacent parts is identified, and then the corresponding outer contour process expansion rule is called from the process expansion rule library to offset the outer contour edge.

[0030] Determine the geometric features of the inner contour edge of the target part, and call the corresponding inner contour process expansion rule from the process expansion rule library to offset the inner contour edge.

[0031] The blanking drawing of the target part is generated based on the blanking sketch completed by offset.

[0032] Finally, the blanking drawings of the target parts of the product are checked into the PLM to realize online management of blanking drawings based on PLM.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for automatically generating cutting diagrams for non-standard hydraulic support plates, characterized in that: Includes the following steps: Establish process expansion rule libraries for the outer and inner contours of non-standard parts in 3D software; Load the product component model into the 3D software, project the target part from the product component model to form a blanking sketch, and identify the outer and inner contour features of the target part from the blanking sketch; Determine the assembly relationship between the outer contour edge of the target part and the surrounding parts, and call the corresponding outer contour process expansion rule from the process expansion rule library to offset the outer contour edge; Determine the geometric features of the inner contour edge of the target part, and call the corresponding inner contour process expansion rule from the process expansion rule library to offset the inner contour edge; The blanking drawing of the target part is generated based on the blanking sketch completed by offset.

2. The method for automatically generating cutting drawings for non-standard hydraulic support plates according to claim 1, characterized in that: The aforementioned process scaling rule library includes an outer contour process scaling rule library and an inner contour process scaling rule library. The outer contour process scaling rule library is established through the following steps: First, the assembly relationship between the outer contour of the target part and the surrounding adjacent parts is classified into no assembly, plate surface assembly, and plate thickness assembly. Second, based on the assembly relationship type, establish specific numerical values ​​for the process expansion of the corresponding target part's outer contour, forming a rule library for the process expansion of the outer contour. Finally, the outer contour process scaling rule library is configured in the 3D software.

3. The method for automatically generating cutting diagrams for non-standard hydraulic support plates according to claim 2, characterized in that: The inner contour process scaling rule library was established through the following steps: Analyze the roughness of the inner contour of the target part, and then establish specific values ​​for the process expansion of the inner contour of different product parts based on the roughness level, forming a rule library for the process expansion of the inner contour. Finally, the inner contour process scaling rule library is configured in the 3D software.

4. The method for automatically generating cutting drawings for non-standard hydraulic support plates according to claim 1, characterized in that: After loading the product component model into the 3D software, the target part is identified according to the part name, and the target part is projected to form a blanking sketch.

5. The method for automatically generating cutting drawings for non-standard hydraulic support plates according to claim 1, characterized in that: The assembly relationship between the outer contour edge of the target part and the surrounding parts is determined based on the geometric topological relationship of the 3D model.

6. The method for automatically generating cutting drawings for non-standard hydraulic support plates according to claim 1, characterized in that: After generating the blanking drawing of the target part based on the blanking sketch completed by offset, the blanking drawing is checked into the PLM system, and the PLM system manages the blanking drawing.

7. The method for automatically generating cutting drawings for non-standard hydraulic support plates according to claim 1, characterized in that: The 3D software is CAD software.

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