CN105069243A - Catia-based part assembly relationship deriving method - Google Patents

Abstract

The present invention relates to the field of part assembly design, and in particular to a Catia-based part assembly relationship deriving method which aims to solve the problems that the existing part assembly relationship deriving method is cumbersome in process and complex in operation. The Catia-based part assembly relationship deriving method comprises: performing recursive traversal on a part tree to obtain an assembly relationship of each sub part; then establishing a position array of each sub part according to the assembly relationship; and finally deriving the position arrays automatically in a relationship table form without the help of other software. By adopting the method, particularly for counting assemblies with more parts and complex structures, the time and labor cost can be effectively saved.

Description

A Catia-based method for deriving component assembly relations

technical field

The invention relates to the field of component assembly design, in particular to a Catia-based component assembly relationship derivation method.

Background technique

When using Catia for assembly design, sometimes it is necessary to count and export the parts of the entire part tree. At present, statistical output is generally performed manually or layer by layer with the help of special EBOM software, which is cumbersome and complicated to operate.

Contents of the invention

The purpose of the present invention is to provide a Catia-based component assembly relationship derivation method to solve the problems of cumbersome process and complicated operation in the current component assembly relationship derivation method.

Technical scheme of the present invention is:

A Catia-based component assembly relationship export method, including:

Step 1. According to the input part design information, the part tree of the part is obtained;

Step 2, recursively traversing the part tree to obtain the assembly relationship of each sub-component in the part;

Step 3, establishing a position array of each sub-component according to the assembly relationship;

Step 4: Export the assembly relation table of each sub-component according to the position array.

Optionally, in the second step, a Catia programming interface is used to recursively traverse the part tree based on a recursive algorithm.

Optionally, in the step 4, the position array is exported through Excel.

Beneficial effects of the present invention:

The Catia-based component assembly relationship derivation method of the present invention obtains the assembly relationship of each sub-component by recursively traversing the part tree, and then establishes the position array of each sub-component according to the assembly relationship, and finally automatically derives it in the form of a relationship table, without With the help of other software, especially for the statistics of assemblies with many parts and complex structures, time and labor costs can be effectively saved.

Description of drawings

Fig. 1 is the schematic diagram of the parts tree of the parts of the preferred embodiment of the present invention;

Fig. 2 is a flow chart of the recursive traversal algorithm in step 2 of the preferred embodiment of the present invention.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

As shown in Figures 1 and 2, a Catia-based component assembly relationship derivation method provided by the present invention includes:

Step 1. Obtain the part tree of the part according to the input part design information; the part can include multiple assemblies and parts, and can include multiple layers; the specific part tree structure can be referred to as shown in Figure 1, and the assembly includes assembly A ~Assembly D, the parts include parts A~parts G, the parts tree includes a total of 4 layers.

Step 2: Perform recursive traversal on the part tree in step 1 to obtain the assembly relationship of each sub-component in the part. In this step, the part tree can be recursively traversed through various software; further, in this embodiment, the part tree is recursively traversed based on a recursive algorithm using the Catia programming interface.

Referring to Fig. 2, the process of traversing the part tree is a recursive process, two position coordinates L and H are set to respectively record the number of layers and the number of rows when traversing, starting from the root node (the number of layers L and the number of rows H are respectively set to 1), traverse according to the following steps:

1), each time a node is visited, the node information is extracted, and the current layer number L and row number H together with the node information are recorded as one item;

2) Determine whether the current node has child nodes:

21), if there is a child node, add 1 to the current layer number L and the row number H respectively, and continue to visit the next child node;

22), if there is no child node, return the parent node of the current node, and subtract 1 from the current layer number L, and then visit the next child node of the parent node, and finally get the following recursive traversal result table 1;

Recursively traverse the result table 1

drawing number node information Number of rows H Level L Assembly A . . . . 1 1 Assembly B . . . . 2 2 Part C . . . . 3 3 Part D . . . . 4 3 Part A . . . . 5 2 Assembly C . . . . 6 2 Assembly D . . . . 7 3 Part F . . . . 8 4 Part G . . . . 9 4 Part E . . . . 10 3 Part B . . . . 11 2

Step 3. According to the assembly relationship of each sub-component obtained in step 2, an array of positions of each sub-component is established.

Step 4. According to the position array obtained in Step 3, an assembly relationship table of each sub-component is derived. Similarly, in this step, the position array can be exported to the assembly relationship table of each sub-component in various ways. Further, in this embodiment, the position array is exported through Excel to obtain the assembly relationship of each sub-component in the form of an Excel table. As shown in table 2;

Assembly relationship table of each sub-component 2

The Catia-based component assembly relationship derivation method of the present invention obtains the assembly relationship of each sub-component by recursively traversing the part tree, and then establishes the position array of each sub-component according to the assembly relationship, and finally automatically derives it in the form of a relationship table, without With the help of other software, especially for the statistics of assemblies with many parts and complex structures, time and labor costs can be effectively saved.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (3)

1., based on a parts assembly relation deriving method of Catia, it is characterized in that, comprising:

Step one, according to input part design information, obtain described parts part tree;

Step 2, recursive traversal is carried out to described part tree, obtain the assembly relation of each subassembly in described parts;

Step 3, set up the position array of described each subassembly according to described assembly relation;

Step 4, according to described position array derive described each subassembly assembly relation table.

2. the parts assembly relation deriving method based on Catia according to claim 1, is characterized in that, in described step 2, is utilize Catia DLL (dynamic link library), based on recursive algorithm, carries out recursive traversal to described part tree.

3. the parts assembly relation deriving method based on Catia according to claim 1 and 2, is characterized in that, in described step 4, is described position array derived by Excel.